(cos3A+sin3A)/(cos A-sin A)=

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

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

( cos^(3) A + sin^(3) A )/( cos A + sin A ) + (cos^(3) A - sin^(3)A)/( cos A- sin A) =

If ( cos 3A+ sin 3A)/( cos A - sin A )=1-k sin 2A , the value of k is

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

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

tan^(-1)[(2cos x-3sin x)/(3cos x+2sin x)]

Number of solution(s) of the equation (sin x)/(cos3x)+(sin3x)/(cos3x)+(sin2x)/(cos27x)=0 in the interval (0,(pi)/(4)) is

Number of solutions (s) of the equation (sin x)/(cos 3x) +(sin 3x)/(cos 9x)+(sin 9x)/(cos 27 x)=0 in the interval (0, pi/4) is __________.