已知函数f(x)=(sin x)^2 +a cosx +0.625a -1.5 ,0

问题描述:

已知函数f(x)=(sin x)^2 +a cosx +0.625a -1.5 ,0

f(x)=1-(cos x)^2 +a cosx +0.625a -1.5
=-(cos x)^2 +a cosx +0.625a -0.5 ,0