函数f(x)=Asin(2x+π/3)(x属于R的图像过点P(7π/12,2)求f(x)的解析式
问题描述:
函数f(x)=Asin(2x+π/3)(x属于R的图像过点P(7π/12,2)求f(x)的解析式
答
将(7π/122)代入
f(x)=Asin(14π/12+π/3)
=Asin(3/2π)=2
所以
A=-2
f(x)=-2sin(2x+π/3)