（数学必修4）第三章 三角恒等变换
[综合训练B组]
一、选择题
1．设![](https://wkrtcs.bdimg.com/rtcs/image?w=363.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_5","w":"363.00","h":"48.00","dataType":"png","c":"word/media/image1_1.png","imgOriW":3807,"imgOriH":504})
则有（ ）
A.![](https://wkrtcs.bdimg.com/rtcs/image?w=60.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_5","w":"60.00","h":"19.00","dataType":"png","c":"word/media/image2_1.png","imgOriW":1440,"imgOriH":448})
B. C. D.
2．函数![](https://wkrtcs.bdimg.com/rtcs/image?w=97.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"97.00","h":"44.00","dataType":"png","c":"word/media/image6_1.png","imgOriW":1972,"imgOriH":891})
的最小正周期是( )
A．![](https://wkrtcs.bdimg.com/rtcs/image?w=16.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"16.00","h":"39.00","dataType":"png","c":"word/media/image7_1.png","imgOriW":384,"imgOriH":928})
B． C． D．
3．![](https://wkrtcs.bdimg.com/rtcs/image?w=233.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"233.00","h":"21.00","dataType":"png","c":"word/media/image11_1.png","imgOriW":4412,"imgOriH":403})
（ ）
A．![](https://wkrtcs.bdimg.com/rtcs/image?w=27.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"27.00","h":"41.00","dataType":"png","c":"word/media/image12_1.png","imgOriW":640,"imgOriH":992})
B． C． D．
4．已知![](https://wkrtcs.bdimg.com/rtcs/image?w=101.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_5","w":"101.00","h":"41.00","dataType":"png","c":"word/media/image16_1.png","imgOriW":2074,"imgOriH":846})
则的值为（ ）
A.![](https://wkrtcs.bdimg.com/rtcs/image?w=23.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_5","w":"23.00","h":"41.00","dataType":"png","c":"word/media/image18_1.png","imgOriW":544,"imgOriH":992})
B. C. D.
5．若![](https://wkrtcs.bdimg.com/rtcs/image?w=65.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"65.00","h":"21.00","dataType":"png","c":"word/media/image22_1.png","imgOriW":1568,"imgOriH":512})
，且，则( )
A．![](https://wkrtcs.bdimg.com/rtcs/image?w=31.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"31.00","h":"39.00","dataType":"png","c":"word/media/image25_1.png","imgOriW":768,"imgOriH":992})
B．
C．![](https://wkrtcs.bdimg.com/rtcs/image?w=44.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"44.00","h":"42.00","dataType":"png","c":"word/media/image27_1.png","imgOriW":1088,"imgOriH":1088})
D．
6．函数![](https://wkrtcs.bdimg.com/rtcs/image?w=124.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"124.00","h":"24.00","dataType":"png","c":"word/media/image29_1.png","imgOriW":2976,"imgOriH":576})
的最小正周期为（ ）
A．![](https://wkrtcs.bdimg.com/rtcs/image?w=17.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"17.00","h":"41.00","dataType":"png","c":"word/media/image30_1.png","imgOriW":416,"imgOriH":992})
B． C． D．
二、填空题
1．已知在![](https://wkrtcs.bdimg.com/rtcs/image?w=45.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_5","w":"45.00","h":"19.00","dataType":"png","c":"word/media/image34_1.png","imgOriW":1088,"imgOriH":448})
中，则角的大小为 ．
2．计算：![](https://wkrtcs.bdimg.com/rtcs/image?w=152.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"152.00","h":"43.00","dataType":"png","c":"word/media/image37_1.png","imgOriW":2543,"imgOriH":714})
的值为_______．
3．函数![](https://wkrtcs.bdimg.com/rtcs/image?w=163.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_5","w":"163.00","h":"41.00","dataType":"png","c":"word/media/image38_1.png","imgOriW":2676,"imgOriH":680})
的图象中相邻两对称轴的距离是 ．
4．函数![](https://wkrtcs.bdimg.com/rtcs/image?w=199.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"199.00","h":"41.00","dataType":"png","c":"word/media/image39_1.png","imgOriW":2977,"imgOriH":619})
的最大值等于 ．
5．已知![](https://wkrtcs.bdimg.com/rtcs/image?w=137.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"137.00","h":"21.00","dataType":"png","c":"word/media/image40_1.png","imgOriW":3296,"imgOriH":512})
在同一个周期内，当时，取得最大值为，当
![](https://wkrtcs.bdimg.com/rtcs/image?w=37.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"37.00","h":"19.00","dataType":"png","c":"word/media/image44_1.png","imgOriW":896,"imgOriH":448})
时，取得最小值为，则函数的一个表达式为______________．
三、解答题
1. 求值：（1）![](https://wkrtcs.bdimg.com/rtcs/image?w=180.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_109","w":"180.00","h":"21.00","dataType":"png","c":"word/media/image48_1.png","imgOriW":3833,"imgOriH":454})
；
（2）![](https://wkrtcs.bdimg.com/rtcs/image?w=235.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_5","w":"235.00","h":"21.00","dataType":"png","c":"word/media/image49_1.png","imgOriW":4426,"imgOriH":402})
。
2．已知![](https://wkrtcs.bdimg.com/rtcs/image?w=69.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_97","w":"69.00","h":"41.00","dataType":"png","c":"word/media/image50_1.png","imgOriW":1664,"imgOriH":992})
，求证：
3．求值：![](https://wkrtcs.bdimg.com/rtcs/image?w=252.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_97","w":"252.00","h":"41.00","dataType":"png","c":"word/media/image52_1.png","imgOriW":3376,"imgOriH":554})
。
4．已知函数![](https://wkrtcs.bdimg.com/rtcs/image?w=208.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_5","w":"208.00","h":"24.00","dataType":"png","c":"word/media/image53_1.png","imgOriW":3928,"imgOriH":453})
（1）当![](https://wkrtcs.bdimg.com/rtcs/image?w=37.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_5","w":"37.00","h":"19.00","dataType":"png","c":"word/media/image54_1.png","imgOriW":896,"imgOriH":448})
时，求的单调递增区间；
（2）当![](https://wkrtcs.bdimg.com/rtcs/image?w=37.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_5","w":"37.00","h":"19.00","dataType":"png","c":"word/media/image56_1.png","imgOriW":896,"imgOriH":448})
且时，的值域是求的值.
第三章 三角恒等变换 [综合训练B组]答案
一、选择题
1.C ![](https://wkrtcs.bdimg.com/rtcs/image?w=416.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_5","w":"416.00","h":"24.00","dataType":"png","c":"word/media/image60_1.png","imgOriW":5686,"imgOriH":328})
2.B ![](https://wkrtcs.bdimg.com/rtcs/image?w=235.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"235.00","h":"44.00","dataType":"png","c":"word/media/image61_1.png","imgOriW":3157,"imgOriH":592})
3.B ![](https://wkrtcs.bdimg.com/rtcs/image?w=517.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"517.00","h":"24.00","dataType":"png","c":"word/media/image62_1.png","imgOriW":6378,"imgOriH":296})
4.D ![](https://wkrtcs.bdimg.com/rtcs/image?w=379.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_5","w":"379.00","h":"41.00","dataType":"png","c":"word/media/image63_1.png","imgOriW":4182,"imgOriH":456})
5.A ![](https://wkrtcs.bdimg.com/rtcs/image?w=395.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"395.00","h":"41.00","dataType":"png","c":"word/media/image64_1.png","imgOriW":4273,"imgOriH":448})
![](https://wkrtcs.bdimg.com/rtcs/image?w=368.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"368.00","h":"45.00","dataType":"png","c":"word/media/image65_1.png","imgOriW":3942,"imgOriH":486})
![](https://wkrtcs.bdimg.com/rtcs/image?w=453.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"453.00","h":"45.00","dataType":"png","c":"word/media/image66_1.png","imgOriW":4394,"imgOriH":439})
6.B ![](https://wkrtcs.bdimg.com/rtcs/image?w=395.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"395.00","h":"41.00","dataType":"png","c":"word/media/image67_1.png","imgOriW":4273,"imgOriH":448})
![](https://wkrtcs.bdimg.com/rtcs/image?w=224.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"224.00","h":"41.00","dataType":"png","c":"word/media/image68_1.png","imgOriW":3172,"imgOriH":585})
二、填空题
1.![](https://wkrtcs.bdimg.com/rtcs/image?w=17.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"17.00","h":"41.00","dataType":"png","c":"word/media/image69_1.png","imgOriW":416,"imgOriH":992})
![](https://wkrtcs.bdimg.com/rtcs/image?w=163.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"163.00","h":"41.00","dataType":"png","c":"word/media/image71_1.png","imgOriW":2676,"imgOriH":680})
，事实上为钝角，
2.![](https://wkrtcs.bdimg.com/rtcs/image?w=47.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"47.00","h":"24.00","dataType":"png","c":"word/media/image74_1.png","imgOriW":1120,"imgOriH":576})
3.![](https://wkrtcs.bdimg.com/rtcs/image?w=25.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"25.00","h":"41.00","dataType":"png","c":"word/media/image76_1.png","imgOriW":608,"imgOriH":992})
![](https://wkrtcs.bdimg.com/rtcs/image?w=181.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_5","w":"181.00","h":"61.00","dataType":"png","c":"word/media/image78_1.png","imgOriW":2355,"imgOriH":797})
，相邻两对称轴的距离是周期的一半
4.![](https://wkrtcs.bdimg.com/rtcs/image?w=16.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"16.00","h":"41.00","dataType":"png","c":"word/media/image79_1.png","imgOriW":384,"imgOriH":992})
5．![](https://wkrtcs.bdimg.com/rtcs/image?w=133.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"133.00","h":"41.00","dataType":"png","c":"word/media/image81_1.png","imgOriW":2405,"imgOriH":746})
三、解答题
1.解：（1）原式![](https://wkrtcs.bdimg.com/rtcs/image?w=429.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_109","w":"429.00","h":"44.00","dataType":"png","c":"word/media/image83_1.png","imgOriW":4333,"imgOriH":444})
![](https://wkrtcs.bdimg.com/rtcs/image?w=387.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"387.00","h":"120.00","dataType":"png","c":"word/media/image84_1.png","imgOriW":2529,"imgOriH":785})
（2）原式![](https://wkrtcs.bdimg.com/rtcs/image?w=312.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_5","w":"312.00","h":"44.00","dataType":"png","c":"word/media/image85_1.png","imgOriW":3667,"imgOriH":517})
![](https://wkrtcs.bdimg.com/rtcs/image?w=267.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_5","w":"267.00","h":"41.00","dataType":"png","c":"word/media/image86_1.png","imgOriW":3478,"imgOriH":539})
![](https://wkrtcs.bdimg.com/rtcs/image?w=227.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_5","w":"227.00","h":"41.00","dataType":"png","c":"word/media/image87_1.png","imgOriW":3192,"imgOriH":582})
2.证明：![](https://wkrtcs.bdimg.com/rtcs/image?w=300.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_97","w":"300.00","h":"41.00","dataType":"png","c":"word/media/image88_1.png","imgOriW":3701,"imgOriH":510})
得![](https://wkrtcs.bdimg.com/rtcs/image?w=193.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"193.00","h":"21.00","dataType":"png","c":"word/media/image89_1.png","imgOriW":3985,"imgOriH":440})
![](https://wkrtcs.bdimg.com/rtcs/image?w=212.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"212.00","h":"19.00","dataType":"png","c":"word/media/image90_1.png","imgOriW":4453,"imgOriH":392})
![](https://wkrtcs.bdimg.com/rtcs/image?w=169.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_97","w":"169.00","h":"21.00","dataType":"png","c":"word/media/image91_1.png","imgOriW":4064,"imgOriH":512})
3.解：原式![](https://wkrtcs.bdimg.com/rtcs/image?w=188.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_97","w":"188.00","h":"41.00","dataType":"png","c":"word/media/image92_1.png","imgOriW":2891,"imgOriH":636})
而![](https://wkrtcs.bdimg.com/rtcs/image?w=341.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"341.00","h":"80.00","dataType":"png","c":"word/media/image93_1.png","imgOriW":2886,"imgOriH":676})
即原式![](https://wkrtcs.bdimg.com/rtcs/image?w=88.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"88.00","h":"41.00","dataType":"png","c":"word/media/image94_1.png","imgOriW":2112,"imgOriH":992})
4.解：![](https://wkrtcs.bdimg.com/rtcs/image?w=400.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_5","w":"400.00","h":"45.00","dataType":"png","c":"word/media/image95_1.png","imgOriW":4117,"imgOriH":467})
（1）![](https://wkrtcs.bdimg.com/rtcs/image?w=337.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_5","w":"337.00","h":"41.00","dataType":"png","c":"word/media/image96_1.png","imgOriW":3936,"imgOriH":482})
![](https://wkrtcs.bdimg.com/rtcs/image?w=161.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_5","w":"161.00","h":"41.00","dataType":"png","c":"word/media/image97_1.png","imgOriW":2664,"imgOriH":683})
为所求
（2）![](https://wkrtcs.bdimg.com/rtcs/image?w=331.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_5","w":"331.00","h":"45.00","dataType":"png","c":"word/media/image98_1.png","imgOriW":3727,"imgOriH":511})
，
![](https://wkrtcs.bdimg.com/rtcs/image?w=272.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"272.00","h":"45.00","dataType":"png","c":"word/media/image99_1.png","imgOriW":3364,"imgOriH":561})
![](https://wkrtcs.bdimg.com/rtcs/image?w=131.00&md5sum=aae6c7c6ea10de4a67e1b550e64d118c&sign=0366ef1501&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=557&ipr={"t":"img","r":"r_13","w":"131.00","h":"25.00","dataType":"png","c":"word/media/image100_1.png","imgOriW":3136,"imgOriH":608})
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