Verify `cos3A=4cos^(3)A-3cosA`, when A = `30^(@)`

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

Prove that sin 4A=4 sin A cos^(3) A-4 cos A sin^(3) A

The value of 2 sin A cos^(3)A-2 cos A sin^(3)A is …………

Find the range of the function f(x)=4cos^(3)x-8cos^(2)x+1 .

Prove that following identities (sin^(3)A+cos^(3))/(sinA+cosA)+(sin^(3)A-cos^(3)A)/(sinA-cosA)=2

The value of 4 sin A cos ^3 A -4 cos sin^3 A is equal to

If cosA.cos30^(@)=(sqrt(3))/(4) , then the measures of A is……………

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