Question

Find the value of Cosec(-210)

Answer 1

Explanation:

csc(−210∘)=1sin(−210∘)=−1sin(210∘)(By trig ratios and identities)

=−1sin(180∘+30∘)

=−1−sin30∘ (By the 180∘ rule)

=2 (By standard triangle values)

Answer 2

ans is 2.
it's easy to find sin(-210) and inverse it.thats the ans.