Dugga

The exercise was created 2018-04-23 by kaelg001. Question count: 25.




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  • cos(x + y) cos(x) cos(y) − sin(x) sin(y)
  • sin(x + y) sin(x) cos(y) + cos(x) sin(y)
  • cos(2 x) = cos²(x) − sin²(x) = 2 cos²(x) − 1 1 − 2 sin²(x)
  • cos(2 x) = cos²(x) − sin²(x) = 1 − 2 sin²(x) 2 cos²(x) − 1
  • cos(2 x) = 2 cos²(x) − 1 = 1 − 2 sin²(x) cos²(x) − sin²(x)
  • cos²(x) − sin²(x) = 2 cos²(x) − 1 = 1 − 2 sin²(x) cos(2 x)
  • sin²(x) (1 − cos(2x))/2
  • cos²(x) (cos(2x) − 1)/2
  • sin(2x) 2 sin(x) cos(x)
  • tan(2x) 2 tan(x)/(1 − tan²(x))
  • ∫x^a x^(a + 1)/(a + 1)
  • ∫1/x ln|x|
  • ∫a^x a^x/ln(a)
  • ∫sin(x) -cos(x)
  • ∫sin²(x) 1/2 (x − sin(x) cos(x))
  • ∫1/sin(x) ln|tan(x/2)|
  • ∫cos(x) sin(x)
  • ∫cos²(x) 1/2 (x + sin(x) cos(x))
  • ∫1/cos(x) ln|tan(x/2 + π/4)|
  • ∫1/cos²(x) tan(x)
  • ∫tan(x) -ln|cos(x)|
  • konvergent gränsvärde existerar
  • divergent gränsvärde existerar inte
  • ln(x) x ln(x) − x
  • arctan x -> ∞ π/2

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