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

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).