I would like to know how to solve the following kind of questions:(adsbygoogle = window.adsbygoogle || []).push({});

Calculate (without expressions of cyclometric functions):

arccos(11/14)+arcsin(-1/7)

And:

Calculate (without expressions of cyclometric functions):

2*arctan(1/2)+arccos(-3/5)

If you could generalize the method of solving these kinds of questions - please do. What kind of relations between the inverse trigonometric functions do I need to know?

Thank you by forehand,

Dobedobedo

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# Exact values of inverse-trig expressions

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