h/sinαsinβ*根号下(sin∧α+sin∧β-2sinαsinβcosαcosβ-2sin∧αsin∧β)这个.怎么化简啊~
问题描述:
h/sinαsinβ*根号下(sin∧α+sin∧β-2sinαsinβcosαcosβ-2sin∧αsin∧β)
这个.怎么化简啊~
答
设α>β>0h/sinαsinβ*√(sin^α+sin^β-2sinαsinβcosαcosβ-2sin^αsin^β)=h/sinαsinβ*√(sin^α+sin^β-2sinαsinβcosαcosβ-sin^αsin^β-sin^αsin^β)=h/sinαsinβ*√(sin^α+sin^β-2sinαsin...