Trigonometry
Determine the exact value of the given inverse trigonometric function without using a calculator.
y=sec−12y=\sec^{-1}2y=sec−12
y=π2y=\frac{\pi}{2}y=2π
y=π3y=\frac{\pi}{3}y=3π
y=0y=0y=0
y=π6y=\frac{\pi}{6}y=6π