How do you calculate the $arctan(1)$ ?

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Answer 1 · 2015-11-21T21:25:07

See explanation.

Arcus tangent is an inverse function to tangent so to calculate $arctan(1)$ you have to find the angle $alpha$ for which $tan alpha=1$

The acute angle for which $tan alpha =1$ is $45^o$ or $pi/4$ radians, so $arctan(1)=pi/4$

How do you calculate the arctan(1)arctan(1)?