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

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Answer 1 · 2015-10-05T13:30:58

$~~63.14372854$

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...

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