Trigonometry
Identify the equation which has a solution equal to 5π6\frac{5\pi}{6}65π .
x=cos−1(−32)x=\cos^{-1}\left(-\frac{\sqrt3}{2}\right)x=cos−1(−23)
x=cos−1(−12)x=\cos^{-1}\left(-\frac12\right)x=cos−1(−21)
x=tan−1(1)x=\tan^{-1}\left(1\right)x=tan−1(1)
x=sin−1(−12)x=\sin^{-1}\left(-\frac12\right)x=sin−1(−21)