Question

How do you find the exact value of `arcsin(1) - arcsin(-1)`?

Answer 1

`- pi`

Explanation:

Use the trig unit circle:
`arcsin (1) --> pi/2`
`arcsin (-1) --> (3pi)/2`
`arcsin (1) - arcsin (-1) = pi/2 - (3pi)/2 = - (2pi)/2 = - pi`