sin²60°+cos²60°、tan45°-sin30°×cos60°、cos²45°/tan²30°
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 05:54:25
![sin²60°+cos²60°、tan45°-sin30°×cos60°、cos²45°/tan²30°](/uploads/image/z/2495176-16-6.jpg?t=sin%26%23178%3B60%C2%B0%2Bcos%26%23178%3B60%C2%B0%E3%80%81tan45%C2%B0-sin30%C2%B0%C3%97cos60%C2%B0%E3%80%81cos%26%23178%3B45%C2%B0%2Ftan%26%23178%3B30%C2%B0)
sin²60°+cos²60°、tan45°-sin30°×cos60°、cos²45°/tan²30°
sin²60°+cos²60°、tan45°-sin30°×cos60°、cos²45°/tan²30°
sin²60°+cos²60°、tan45°-sin30°×cos60°、cos²45°/tan²30°
sin²60°+cos²60°
=3/4+1/4
=1
tan45°-sin30°×cos60°
=1-1/2×1/2
=3/4
cos²45°/tan²30°
=(1/2)/(1/3)
=3/2