f(x)=3根号15sinx-3根号5cosx化简
问题描述:
f(x)=3根号15sinx-3根号5cosx化简
答
f(x)=3√15sinx-3√5cosx
=6√5(√3/2*sinx-1/2*cosx)
=6√5[sinxcos(π/6)-cosxsin(π/6)]
=6√5sin(x-π/6).