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baross56
New Member
USA
1 Posts
Posted  12/07/2010 : 16:44:15
1. (sin x + cos x)^2  1 = 2 sin x cos x
2. cos 4x= cos
2xsin
2x
3. tan 2x= (2tan x)
(1tan
x)
4. 1=2sin
x+cos 2 x
Ultraglide
Advanced Member
Canada
299 Posts
Posted  12/07/2010 : 17:38:59
What are you trying to do and what have you done so far?
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