Question

Solve: 10 sin?(x) – 3sin(x) – 1 = 0

Let u = sin(x).
The given equation is equivalent to
(2u - 1)(5u + 1) = 0
Therefore
sin(x) =
or sin(x) =

Answer 1

sin(x)=1/2 or sin(x)=-1/5

Answer 2

sin(x)= 1/2 or sin(x)= -1/5

Explanation: