What will be the answer to this ? :-
9cot²∅-9cosec²∅=
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9 cot² fi - 9 cosec² fi
=9(cot² fi - cosec² fi)
cosec²fi= 1+cot²fi
=9(cot²fi ‐(1+cot² fi))
=9(cot²fi-1-cot² fi)
=9(-1)= -9....
hopes this helps pls mark brainlist
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