1 answer
(click or scroll down)
2sinĂ˜ - 7sinĂ˜ + 3 = 0
(2sinĂ˜ -1)(sinĂ˜ - 3) = 0
sinĂ˜ = 1/2 or sinĂ˜ = 3 , that last part is not possible
Ă˜ = 30° or x = 150°