Question

How do you calculate `(cos^-1) ((sqrt10)/7)`?

Answer 1

`~~63.14372854`

Explanation:

What you're looking for is the angle whose cosine is `sqrt10/7`.

So you need to find out what `theta` is in `costheta=sqrt10/7`.

You will need to use a calculator for this. Look for a button saying `cos^-1`. Select that, then type in `sqrt10/7`.

You will get 63.14372854...