How do you evaluate $sin^-1 (-1/2)$ ?

Question

72354 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-07-10T22:43:56

$- pi/6 and (7pi)/6$

Trig table, and unit circle give -->
$sin x = - 1/2$ --> arc $x = -pi/6$ and arc $x = pi + pi/6 = (7pi)/6$
$Answers: -pi/6, and (7pi)/6$

How do you evaluate sin^-1 (-1/2)sin^-1 (-1/2)?