cos15度+sin165度的值?

2025-03-20 15:20:43
推荐回答(1个)
回答1:

cos15°+sin165°=cos15°+sin(180°-165°)
=cos15°+sin15°
=√2sin45°cos15°+√2cos45°sin15°
=√2sin(45°+15°)
=√6/2