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(" Trigonometric Ratios ")/(" Ex."21:" Prove that "sec^(4)A-sec^(2)A=tan^(4)A+tan^(2)A)

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Prove that sec^(4)A-sec^(2)A=tan^(2)A+tan^(4)A .

prove that 1+2sec^(2)A*tan^(2)A-sec^(4)A-tan^(4)A=0

Prove: sec^(4)A(1-sin^(4)A)-2tan^(2)A=1

Prove the following identities: sec^(4)A-sec^(2)A=tan^(4)A+tan^(2)A

Prove: tan^(2)A sec^(2)B-sec^(2)A tan^(2)B=tan^(2)A-tan^(2)B

Prove that (sec8A-1)/(sec4A-1)=(tan8A)/(tan2A)

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Prove that sec^4theta-sec^2theta=tan^4theta+tan^2theta .

What is tan^(4)A-sec^(4)A+tan^(2)A +sec^(2)A equal to ?

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