# How do you evaluate the equation #arctan(pi/2)#?

##### 1 Answer

Nov 11, 2015

#### Explanation:

There is no "equation" here to evaluate but assuming the question was intended to be

First note that the value **but** the argument of the

If

we have the situation with opposite to adjacent side ratios as indicated below:

This is not one of the "standard" triangles and the only way to (reasonably) evaluate it is to use a calculator (or trig tables) to get the value indicated in the "Answer" above.