# How do you evaluate #cot(arctan (3/5))#?

##### 2 Answers

May 28, 2016

#### Explanation:

Let

So, the given expression is

May 28, 2016

#### Explanation:

Use the fact that

#cot(arctan(3/5))=1/tan(arctan(3/5))#

Note that

So, the tangent and arctangent functions in the denominator will cancel one another out, leaving only

#1/tan(arctan(3/5))=1/(3/5)=5/3#