sin80°cos35°-cos80°sin35°=?

2025-02-25 03:41:44
推荐回答(2个)
回答1:

原式=sin(80-35)
=sin45
=√2/2

回答2:

sin80°cos35°-cos80°sin35°
=sin(80-35)
=sin45
=√2/2