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~

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...