For $\displaystyle \frac{\pi}{2}<x<\pi$ with $\displaystyle \cos x = -\sin \frac{\pi}{6} $, find the value of x.
The question also states to not evualate the value of $\displaystyle \sin \frac{\pi}{6}$
How do I do this question?
For $\displaystyle \frac{\pi}{2}<x<\pi$ with $\displaystyle \cos x = -\sin \frac{\pi}{6} $, find the value of x.
The question also states to not evualate the value of $\displaystyle \sin \frac{\pi}{6}$
How do I do this question?