问题标题:
已知函数f(x)=Asin(x+ψ)(A〉0,0
问题描述:
已知函数f(x)=Asin(x+ψ)(A〉0,0
饶立昌回答:
f(x)=Asin(x+ψ),A=1,x+ψ=2kπ+π/21/2=sin(π/3+ψ),π/3+ψ=2kπ+5π/6ψ=π/2f(x)=sin(x+π/2)3/5=sin(a+π/2)=cosa,sina=4/512/13=sin(b+π/2)=cosb,sinb=5/13f(a-b)=sin(a-b+π/2)=cos(a-b)=cosacosb+...
点击显示
数学推荐
热门数学推荐