设f(sin x/2)=cosx+1,求f(x)及f(cos x/2).
问题描述:
设f(sin x/2)=cosx+1,求f(x)及f(cos x/2).
答
f(x)=2-2x^2 f(cos x/2)=1-cos x
设f(sin x/2)=cosx+1,求f(x)及f(cos x/2).
f(x)=2-2x^2 f(cos x/2)=1-cos x