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#176 Factored Polynomials aren't differentiated correctly  ← ↑ →  #178 Linear Agebra problem

#177 expand (cos (2*x))
  
last edited 17 years ago by kratt6

Edit detail for #177 expand (cos (2*x)) revision 1 of 2
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Time: 2007/11/17 22:03:02 GMT-8
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expand (cos (x+y)) and expand (cos (x+y+z)) are right.

Is it possible to expand cos (2*x) = 2*cos(x)^2-1 or 1 - 2*sin(x)^2

Submitted by : (unknown) at: 2007-11-17T22:03:02-08:00 (17 years ago)
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expand (cos (x+y)) and expand (cos (x+y+z)) are right.

Is it possible to expand cos (2x) = 2cos(x)^2-1 or 1 - 2*sin(x)^2