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#1 2008-10-21 01:47:41
- esatpllana
- Member
- Registered: 2007-11-22
- Posts: 12
Trigonometric Identities problem
Hi guys!
Can anyone solve this
thanks
Last edited by esatpllana (2008-10-21 01:50:46)
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#2 2008-10-21 03:13:14
- Kurre
- Member
- Registered: 2006-07-18
- Posts: 280
Re: Trigonometric Identities problem
a/2=2*a/4
use the double angle formulas:
sin2x=2cosxsinx
cos2x=cos^2x-sin^2x=2cos^2x-1=1-2sin^2x
Last edited by Kurre (2008-10-21 03:13:31)
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