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[" 271."2cos x-cos3x-cos5x=" [Roorkee "1...

[" 271."2cos x-cos3x-cos5x=" [Roorkee "1974]],[" (A) "16cos^(3)x sin^(2)x" (B) "16sin^(3)x cos^(2)x],[" (C) "4cos^(3)x sin^(2)x" (D) "4sin^(3)x cos^(2)x]

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2cosx-cos3x-cos5x= ............... A) 16 cos ^(3) x sin ^(2) x B) 16 sin^(2) x cos ^(2) x C) 4 cos ^(2) x sin ^(2) x D) 4 sin ^(2) x cos ^(2)x

cos x+cos3x+cos5x+cos7x=0

int(sin^(2)x cos^(2)x)/((sin^(5)x+cos^(3)x sin^(2)x+sin^(3)x cos^(2)x+cos^(5)x)^(2))backslash dx

int(sin^(2)x cos^(2)x)/((sin^(5)x+cos^(3)x sin^(2)x+sin^(3)x cos^(2)x+cos^(5)x)^(2))backslash dx

int \ (sin^2x cos^2x)/(sin^5x+cos^3x sin^2x + sin^3x cos^2x + cos^5x)^2 \ dx

cos5x= 16 cos^(5) x -20 cos^(3) x +5 cos x in

Prove that cos ^(3) x sin ^(2) x = (1)/(16) (2cos x - cos 3x - cos 5x).

cos3x+cos2x+cos x=0