Question

Solve: $f\left(x\right)=\sin x-\cos x=0$

0<x<$\frac{\pi }{2}$

Answer 1

$\sin x-\cos x=0\sin x=\cos x\frac{\sin x}{\cos x}=1\tan x=1\tan x=\tan \frac{\pi }{4}x=\frac{\pi }{4}$