Question

What does `-cos(arccos(5))+2csc(arctan(12))` equal?

Answer 1

It's −2.99306757

Explanation:

The functions cosine and arccosine are inverse, so `-cos(arccos(5))` just equals `-5`

`arctan (12) = 1.48765509`
`csc(1.48765509) = 1.00346621`
Two times that is `2.00693243`

`(-5) + 2.00693243 = −2.99306757`