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" 10.face allute "cos4A=1-8sin^(2)A+8sin...

" 10.face allute "cos4A=1-8sin^(2)A+8sin^(4)A

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cos4x=1-8sin^(2)x cos^(2)x

cos4x=1-8sin^(2)x cos^(2)x

cos4x=1-8sin^(2)x cos^(2) x

Prove that :cos4x=1-8sin^(2)x cos^(2)x

Prove that cos4x=1-8sin^(2)xcos^(2)x

Prove that : cos4x=1-8sin^2xcos^2x

If cosA+cos^(2)A=1 , then find the value of sin^(8)A+2sin^(6)A+sin^(4)A .

If cosA+cos^(2)A=1 , then find the value of sin^(12)A+3sin^(10)A+3sin^(8)A+sin^(6)A+sin^(4)A+sin^(2)A .

If sin A+sin^(2)A+sin^(3)A=1, then find the value of cos^(6)A-4cos^(4)A+8cos^(2)A

" If "cos x+cos^(2)x+cos^(3)x=1" ,then the value of "sin^(6)x-4sin^(4)x+8sin^(2)x" is"