设f(sin(x/2))=1+cosx,求f(cosx)
人气:376 ℃ 时间:2020-05-14 03:24:34
解答
f[sin(x/2)]=1+cos x
=1+1-2[sin(x/2)]^2
=2-2[sin(x/2)]^2
f(cos x)=2-2(cos x)^2
推荐
- f(sin(x/2))=2-cosx
- 已知f[φ(x)]=1+cosx,φ(x)=sin(x/2),求f(x).
- 已知f (2-cosx)=5-sin^2 x ,求f(X)
- 为什么 f(x)=sin(x+π/2)=cosx
- 已知f(g(x))=1+cosx,g(x)=sin(x/2),求f(x).
- 一定质量的气体封闭在绝热容器,当体积变大时,气体的内能为什么减小,WHY
- The farmer uses wood to build a house ____to store grain.A.in which B.where C.which D.with which
- 已知角1角2互补,且角1比角2小30度,求2倍的角1减角2
猜你喜欢