Question

How to find the value of `csc((5pi)/4)`?

Answer 1

Find `csc ((5pi)/4)`

Ans: `-sqrt2`

Explanation:

`csc((5pi)/4) = 1/sin ((5pi)/4)`

`sin ((5pi)/4) = sin (pi/4 + pi) = - sin pi/4 = - sqrt2/2`

`csc ((5pi)/4) = 1/sin = -2/sqrt2 = - sqrt2`