Thursday, June 7, 2012

If sin2x + cos2x = 1...


If sin2x + cos2x = 1, tan2x + 1 = sec2x, what is
  1. 16 – 4sin2x
  2. 4 + 2tan2x
  3. 16 – x2
  4. 1 + 2x2


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