sin60°*cos45°+cos30°*sin45°根6/4*tan45°=?sin60°*cos45°+cos30°*sin45°+根6/4*tan45°=?
问题描述:
sin60°*cos45°+cos30°*sin45°根6/4*tan45°=?
sin60°*cos45°+cos30°*sin45°+根6/4*tan45°=?
答
√3/2(cos45+sin45)+√6/4*1
=√3/2*√2*1+√6/4*1
=3√6/4