Question

What does `cos(arctan(1))+3csc(arc csc(2))` equal?

Answer 1

`1/sqrt2+6`

Explanation:

As tan`(pi/4)=1`, arctan (1) =`pi/4` and csc(arccsc(a)) =a.
So, the expression = cos `pi/4` + 3X2 =`1/sqrt2`+ 6.

Also, arctan(1) = arc cos`(1/sqrt2)`.
cos`arc cos (1/sqrt2)=1/sqrt2`..