sin3A=cos(A-26)

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If sin 3A = cos (A- 26^@ ) where 3A is an acute angle, find the value of A.

If sin 3A = cos(A - 26^@) , where 3A is an acute angle, find the value of A.

Prove that : cos^(3)A cos3A+sin^(3)A sin3A=cos^(3)2A

sin^(3)A sin3A+cos^(3)A cos3A=cos^(3)(2A)

(cos3A+sin3A)/(cos A-sin A)=1+2sin2A

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

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(sin3A-cos(pi/2-A))/(cosA+cos(pi+3A))=

If sin A+sin 2A+sin3A=cos A+cos 2A+cos 3A, then tan 2A is equal to