[" (11) "sec^(4)A(1-sin^(4)A)-2tan^(2)A=1],[" tron "theta]

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

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

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

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

sec^(4)theta(1-sin^(4)theta)-2tan^(2)theta=1

Prove that following identities sec^(4)theta(1-sin^(4)theta)-2tan^(2)theta=1

prove that sec^4 A(1-sin^4 A) - 2tan^2 A = 1.

sec^(4) theta (1-sin^4 theta ) - tan^(2) theta =

Prove that: (i) sec^(4)A-sec^(2)A="tan"^(4)A+"tan"^(2)A (ii) "sin"^(8)theta-cos^(8)theta=("sin"^(2)theta-cos^(2)theta)(1-2"sin"^(2)thetacos^(2)theta) .