Question

Solve the given equation. (Enter your answers as a comma-separated list. Let k be any integer. Round terms to three decimal places where appropriate. If there is no solution, enter NO SOLUTION.)
sin θ cos θ − 2 sin θ = 0

Answer 1

sin θ cos θ − 2 sin θ = 0
factor out sin(θ)
sin(θ)(cos(θ)-2) = 0

Can you take it from here?

Answer 2

that is where i got stuck

Answer 3

When a product of factors is zero, one of the factors must be zero.

So, either
sin(θ) = 0 or cos(θ)-2 = 0

sin(θ) = 0 when θ = k*pi

cos(θ)-2 = 0 when cos(θ) = 2
but cos(θ) is always less than 1. No solution here.