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sin^(4)A+cos^(4)A=1-2sin^(2)A*cos^(2)A v...

sin^(4)A+cos^(4)A=1-2sin^(2)A*cos^(2)A varnothing

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sin^(4)x+cos^(4)x=1-2sin^(2)x cos^(2)x

Prove the following identities: sin^(4)A+cos^(4)A=1-2sin^(2)A cos^(2)A

cos^(4)A-sin^(4)A=2cos^(2)A-1

cos^(4)A-sin^(4)A=2cos^(2)A-1

Prove the following identities: sin^(4)A-cos^(4)A=sin^(2)A-cos^(2)A=2sin^(2)A-1=1-2cos^(2)A

sin^(4)theta+cos^(4)theta=1-2sin^(2)theta cos^(2)theta

(sin^4A-cos^4A)/(sin^2A-cos^2A)=

Prove the following cos^(4)A-sin^(4)A+1=2cos^(2)A

What is ( cos ^(4) A - sin ^(4) A)/( cos ^(2) A - sin ^(2) A) equal to ?

sin^4A-cos^4A=2sin^2A-1=1-2cos^2A=sin^2A-cos^2A