Question

Inverse of 90 degrees and -90 degrees on calculator

Answer 1

`\theta=45^o`

Explanation:

To find the value of theta, we take the inverse tan of both sides to get

`\tan ^(-1)\lbrack\tan \theta\rbrack=\tan ^(-1)\lbrack1\rbrack`
`\theta=\tan ^(-1)\lbrack1\rbrack`

Using the calculator gives

`\theta=45^o`