How many values of x with 0∘≤x<990∘ satisfy sinx=−0.31?
990° = 720° + 270° = 360° + 360° + 270°
There will be two occurences of this in every 360° and one more between 0 and 270°
So....there will be 2 + 2 + 1 = 5 values of x
