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March 11th, 2011, 03:20 PM   #1
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Simple Trig

Simplify the following as much as possible:



I get that the top simplifies to , but the bottom isn't pretty and I'm not sure what to do with it.
Could anyone help me out?
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March 11th, 2011, 03:52 PM   #2
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Re: Simple Trig

Hello, clandarkfire!

Quote:

It helps if you know some multiple-angle identities:

[color=beige]. . / / / [/color]





[color=beige]. . [/color]

[color=beige]. . . . . . . . . . . . . . . . .[/color]








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March 11th, 2011, 05:32 PM   #3
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Re: Simple Trig

Thankyou!
I got the numerator, but my method of finding cos3x gave me and somehow I didn't get that that was equal to
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March 12th, 2011, 02:51 PM   #4
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If you can't find your mistakes, we can identify them if you post your work here.
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March 12th, 2011, 05:14 PM   #5
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By using the right trigonometric identities, you should be able to arrive at the correct answer.
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