Question

solve sinx+1=cosx

Answer 1

sin - cos =-1
square both sides
-2sin cos =0
sin =0 or cos =0
you do the rest, ok?

Answer 2

@Jackie.torres87 can you solve therest?

Answer 3

The only step @Loser66 skipped over, that you may want to reference, is:\[(\sin(x)-\cos(x))^2 = \color{red}{\sin^2(x)} -2\sin(x)\cos(x)\color{red}{+\cos^2(x)} = -2\sin(x)\cos(x)\color{red}{+1}\]