Question

Find all solutions to the equation. (sin x)(cos x) = 0

Answer 1

hello : 
 (sin x)(cos x) = 0
sinx = 0  or cosx= 0 
all solutions in : R
1) sinx= 0  : x = kπ......  k∈ Z
2) cosx= 0 : x= π/2 + kπ ....k∈ Z