simplify

cos2xcosx+sin2xsinx

a cosx

b sinx

c cos3x

d sin3x

what I tried was....

?

Printable View

- Jun 5th 2009, 05:24 PMbrentwoodbc[SOLVED] double angle
simplify

cos2xcosx+sin2xsinx

a cosx

b sinx

c cos3x

d sin3x

what I tried was....

? - Jun 5th 2009, 05:30 PMSpec
Use , and

- Jun 5th 2009, 05:32 PMmr fantastic
- Jun 5th 2009, 05:38 PMbrentwoodbc
Thank you.