![cos0615°? cos60°](https://img.wumaow.org/upload/tu/419845187.jpg)
cos0615°?
![sin300° cos315° 2sin3/2℃兀 cos60°](https://img.wumaow.org/upload/tu/419845188.jpg)
sin300° cos315° 2sin3/2℃兀
![cos135°等于多少啊在线求答案 cos60°](https://img.wumaow.org/upload/tu/419845189.jpg)
cos135°等于多少啊在线求答案
![cos40° cos80°为什么等于 2cos60°cos20 cos60°](https://img.wumaow.org/upload/tu/419845190.jpg)
cos40° cos80°为什么等于 2cos60°cos20
图片内容是:cos60°
![利用sin30°=cos60°来计算 cos60°](https://img.wumaow.org/upload/tu/419845191.jpg)
利用sin30°=cos60°来计算
![4sin60° 2cos45° 3tan30° sin45°分别等 cos60°](https://img.wumaow.org/upload/tu/419845192.jpg)
4sin60° 2cos45° 3tan30° sin45°分别等
![(cos15°-cos75°)(sin75° sin15°)=?详细过程,谢谢! cos60°](https://img.wumaow.org/upload/tu/419845193.jpg)
(cos15°-cos75°)(sin75° sin15°)=?详细过程,谢谢!
![cos30°tan30° sin60°tan45°tan60°= cos60°](https://img.wumaow.org/upload/tu/419845194.jpg)
cos30°tan30° sin60°tan45°tan60°=
![解: cos 105 cos (60 45 = cos 60 cos 45 cos60°](https://img.wumaow.org/upload/tu/419845195.jpg)
解: cos 105 cos (60 45 = cos 60 cos 45