Prove that #cos^3Acos(3A)+sin^3A(sin3A)=cos^3 2A# ?
3 Answers
Please refer to a Proof given in the Explanation Section.
Explanation:
Recall that,
Sub.ing these, we have,
Enjoy Maths.!
Kindly refer to a Proof in the Explanation.
Explanation:
Here is a Second Method to solve the Problem.
We know the following Identities :
Enjoy Maths.!