Question

Trigonometic Equations and Inequalities.
Solve the following equations
Solve the equation f(0) = f(z) if f(x) = 5 sin x + 3 cos x.

Answer 1

given

$4f\left(x\right)=5sinx+3cosx$

therefore $f\left(0\right)=3$

implies $f\left(z\right)=3$