Question

Prove that cot4A – 1 = cosec4A – 2cosec2A

Answer 1

LHS = cot4A − 1=(cot2A)2 − (1)2=(cot2A − 1) (cot2A + 1)=(cot2A − 1) cosec2A=cosec2A(cot2A − 1)=cosec2A [cosec2A − 1 − 1]=cosec2A[cosec2A − 2]=cosec4A − 2 cosec2A=RHS

Answer 2

Answer:

Step-by-step explanation:

Cot4A - 1 = Cosec4A - 2Cosec2A

Answer Given Below