Question

Please help me with this one. I have a test about this tomorrow and still don't quite get it.

Find the exact value of the expression, if possible. Do not use calculator.
sin^-1 [sin (6pi / 7)]

Answer 1

what would be your coterminal angle?

Answer 2

hint: when you take the inverse of the function, you get the function itself.

Answer 3

The inverse function outdoes the original function.

Answer 4

\[\sin^{-1}(\sin(x)) = x\]

Answer 5

but in the answer says that is pi/7

Answer 6

i think is just like that when is around -90 and 90