Question

Evaluate cos(tan^-1 0)

Answer 1

the correct answer is 1

Answer 2

`cos(tan^(-1)(0))=1`

Explanation:

Evaluate cos(tan^-1 0)

`cos(tan^(-1)(0))`

We know that tan(0)=0

tan (0 degree)=0

`tan^(-1)(0)=0`

Replace it in our problem

`cos(tan^(-1)(0))`

`cos(0)`

At 0 degree the cos value is 1

So co(0)=1

`cos(tan^(-1)(0))=1`