Math, asked by sanchipranavi24, 1 month ago

Prove that cot^4 A-1 = cosec^4A 2cosec^2 A​

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Answered by Sugarstar6543
8

Step-by-step explanation:

LHS=cot*A-1

=(cot²A)²-(1)²

=(cot A+1)(cot²-1)

=(cosec²A-1+1)(cosec²A-1-1)

=cosec²A(cosec²A-2)

=cosec¹A-2cosec*A=RHS

HENCE PROVED

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