f(X)=2sinx/2*sin(π/3-x/2)最大值
问题描述:
f(X)=2sinx/2*sin(π/3-x/2)最大值
答
积化和差公式:sinαsinβ=-[cos(α+β)-cos(α-β)]/2
f(x)=cos(x-π/3)-cos(π/3)
=cos(x-π/3)-1/2