simplify

cos2xcosx+sin2xsinx

a cosx

b sinx

c cos3x

d sin3x

what I tried was....

?

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- Jun 5th 2009, 06:24 PMbrentwoodbc[SOLVED] double angle
simplify

cos2xcosx+sin2xsinx

a cosx

b sinx

c cos3x

d sin3x

what I tried was....

? - Jun 5th 2009, 06:30 PMSpec
Use , and

- Jun 5th 2009, 06:32 PMmr fantastic
- Jun 5th 2009, 06:38 PMbrentwoodbc
Thank you.