Question

Find the exact value of `sin^-1 (-1/2)-tan^-1(3/4)`?

Answer 1

`- 66.87 deg`

Explanation:

The `30 deg` is the arcsin of 1/2 and so, is `- 30 deg` is the arcsin of -1/2

The "Pitagorian triangle (3, 4, 5)" is the one of tan 3/4 and so the arctan is `36.87 deg`

The angle you are looking for is `- 66.87 deg`, the sum of `- 30 deg` - `36.87 deg`