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

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Answer 1 · 2015-08-05T05:13:43

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

Ans: $-sqrt2$

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

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

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

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