求推导sin2a cos2a tan2a 和 sin2a= cos2a=
问题描述:
求推导sin2a cos2a tan2a 和 sin2a= cos2a=
后面是cos 2a 和cos 2a
答
【无敌翻译】团队很高兴为您解答,(1)sin2a=sin(a a)=sinacosa cosasina=2sinacosa(2)cos2a=cos(a a)=cosacosa sinasina=cos^2asin^2a(3)tan2a=tan(a a)=(tana tana)/1-tanatana=tan^2a/1-tan^2a,有不懂的欢迎...