Question

pleae help karo apka time ayega​

Answer 1

Answer:

Here's your answer........^_^

Step-by-step explanation:

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Answer 2

LHS=cot⁴A-1

=(cot²A)²-(1)²

=(cot²A+1)(cot²-1)

=(cosec²A-1+1)(cosec²A-1-1)

=cosec²A(cosec²A-2)

=cosec⁴A-2cosec²A=RHS

hope it will help you.......