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Caitlyn L.

asked • 07/19/17

Trigonometry Proof

Please help me answer the following question! I'm stuck!
 
Prove that cos6ß + sin6ß = 1/4 + 3/4cos2ß
 
I've tried simplifying out the LHS into (cos2ß)3 + (sin2ß)3, but I don't know what to do from there.
 
Thank you so much!

2 Answers By Expert Tutors

By:

Caitlyn L.

Thank you so much! 
And yes, the question was supposed to be 2ß instead of ß, so thanks for picking that up :)
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07/20/17

Arthur D.

tutor
You're very welcome, Caitlyn.
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07/20/17

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