Question

9 cosec² 0 -9 cot² 0=​

Answer 1

Answer:

First take 9 common and than you will get 9(cosec²©-cot²© ) so use cosec²©-cot²©=1 identity.

Answer 2

=9cosec²θ - 9 cot²θ

=9(cosec²θ- cot²θ)

=9(1)

=9