`cos5x=16cos^5x-20cos^3x+5cosx`

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

Prove that: cos5A=16cos^5A-20cos^3A+5cosA

Prove that: cos5A=16cos^(5)A-20cos^(3)A+5cos A

Prove that, cos5A=16cos^(5)A-20cos^(3)A+5cosA

Prove that: cos5A=16cos^(5)A-20cos^(3)A+5cosA

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

If y=sinx , then (d^2(cos^7x)/(dy^2) is equal to 35cos^3x-42cos^5x 35cos^3x+42cos^5x 42cos^3x-35cos^5x -35cos^3x-42cos^5x

To prove (cos5x+cos4x)/(1-2cos3x) = -cos2x-cosx

Prove that cos 5A = 16 cos^5A - 20 Cos^3 A + 5 cos A

2cos x-cos3x-cos5x=