# Answer to Question #12722 in Trigonometry for karthik ps

Question #12722

prove that : cosA + cos2A = sin3A

Expert's answer

This statement is wrong. Let's take A = 0:

cos0 + cos0 = 2 ≠ 0 = sin0.

cos0 + cos0 = 2 ≠ 0 = sin0.

Need a fast expert's response?

Submit orderand get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!

## Comments

## Leave a comment