Question

Prove that sec^4 A - sec^2 A= tan^4 A+tan^2 A

Answer 1

Step-by-step explanation:

LHS:sec^4A-sec^2A

sec^2A(sec^2A-1)

sec^2Atan^2A-------------(1)

RHS:tan^4A+tan^2A

tan^2A(tan^2A+1)

tan^2Asec^2A--------------(2)

(1)=(2)

LHS=RHS

Hence proved

Answer 2

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