Question

Find all solutions to the equation.

7 sin2x - 14 sin x + 2 = -5

Answer 1

is that sin(2x) or sin^2(x)?

Answer 2

sin^2(x)?

Answer 3

ok then you have a quadratic in terms of sin(x)

Answer 4

maybe you can see it better if you replace sin(x) with u

Answer 5

\[7u^2-14u+2=-5\]

Answer 6

do you know how to solve that for u?