`2sinAcos^3A-2sin^3AcosA=`

2sinAcos^(3)A-2sin^(3)AcosA=?

Prove that sin4A=4sinAcos^3A-4sin^3A

sin4A=4sinAcos^3A-4cosAsin^3A

Prove that: (sin3Acos4A-sinAcos2A)/(sin4AsinA+cos6AcosA)=tan2A

Prove that: (sin3Acos4A-sinAcos2A)/(sin4AsinA+cos6AcosA)=tan2A

Writing 4A=2xx2A prove that sin4A=4sinAcos^3A-4cosAsin^3A

Prove that, sin4A=4sinAcos^(3)A-4cosAsin^(3)A

Prove that, sin4A=4sinAcos^(3)A-4cosAsin^(3)A .

if sin4A=4sinAcos^3A-4cosAsin^3A Dividing numerator and denominator on the R.H.S. by cos^4A prove that sin4A=(4tanA(1-tan^2A))/(1+tan^2A)^2

Prove that (sin^3A+cos^3A)/(sin A+cos A)+(sin^3A-cos^3A)/(sin A-cos A)=2