Master Trigonometric Identities with Double Angle Techniques

AI Thread Summary
The discussion focuses on simplifying the expression √(1 + cos(6θ)) using double angle identities. The suggestion is to rewrite 6θ as 2(3θ) to apply the double angle formula effectively. Participants are encouraged to clarify their understanding of the double angle technique to ensure accurate application. The conversation emphasizes the importance of mastering trigonometric identities for solving complex problems. Proper utilization of these identities can enhance problem-solving skills in trigonometry.
Mrencko
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I am doig trigonometric identities and i got this one, (all will be in the picture the solution and my work) i used the double angle for this but i am afraid i didn't get the exact idea, just guessing, good guessing, so i want to know how is the proper way to reach the solution
 
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Here is a little bigger view for folks.

upload_2015-5-6_18-28-10.png


So, I take it that you want to simplify ##\ \sqrt{1+\cos(6\theta)\,}\ ## using the double angle identity for cosine.

Write 6θ as 2(3θ) .
 
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