cosec⁴A-cosec²A =cot⁴A +cot²A proove that
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LHS :-
cosec⁴A-cosec²A
cosec²A(cosec²A-1).
cosec²A.cot²A
(1+cot²A)(cot²A)
cot⁴A+cot²A
proved
hope its help u
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