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

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

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

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

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

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

Prove that cos3A=4cos^3 A-3cosA

Prove that cos5theta=16cos^(5)theta-20cos^(3)theta+5costheta .

Prove that: cos3A+cos5A+cos7A+cos15A=4cos4A cos5A cos6A

Prove that: cos3A+cos5A+cos7A+cos 15 A=4cos4A cos5A cos6A

Prove that: (cos 2A cos 3A -cos 2A cos 7A + cos A cos 10A)/("sin" 4A sin 3A - sin 2A sin 5A + sin 4A sin 7A) = cot 6A cot 5A