Question

Trigonometry: Find all solutions of sin(2x) = -sqrt(3)/2 on [0, 2pi)

I could easily get 2pi/3 and 5pi/6 from the unit circle, but how do you get 5pi/6 and 11pi/6?

Answer 1

So, 2x would then be -60º
And thus x= -30

Answer 2

you just need it in your interval