Mycket bra saker att kunna inför Dugga 2

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• Cos 0 = 1
• Cos π/6 = √3/2
• Cos π/4 = 1/√2
• Cos π/3 = 1/2
• Cos π/2 = 0
• Sin 0 = 0
• Sin π/6 = 1/2
• Sin π/4 = 1/√2
• Sin π/3 = √3/2
• Sin π/2 = 1
• Tan 0 = 0
• Tan π/6 = 1/√3
• Tan π/4 = 1
• Tan π/3 = √3
• Tan π/2 = Ej def
• Cot 0 = Ej def
• Cot π/6 = √3
• Cot π/4 = 1
• Cot π/3 = 1/√3
• Cot π/2 = 0
• Tan V = Motstående/Närliggande
• Cot V = Närliggande/Motstående
• Cos^2 + Sin^2 = 1
• Cos (v+π) = - Cos v
• Sin (v+π) = - sin v
• Cos (π/2 - v) = Sin v
• Sin (π/2 - v) = Cos v
• Cos (-v) = Cos v
• Sin (-v) = - sin v
• Cos (π-v) = - cos v
• Sin (π-v) = Sin v
• Cos 2X = Cos (2X)
• Sin V / Cos V = Tan V
• Cos (u-v) = Cosucosv + sinusinv
• Cos (u+v) = Cosucosv - sinusinv
• Sin (u+v) = Sinucosv + cosusinv
• Sin (u-v) = Sinucosv - cosusinv
• (Cos(a+b)) = Cos(a-(-b))
• Tan (u+v) = (Tanu-tanv) / (1-tanu *tanv)
• ln (x/y) = lnx - lny
• ln 1/x = -lnx
• lnx^n = n*lnx
• y=expx = x=lny
• ln e^x = x
• e^lnx = x
• e^x*e^y = e^(x+y)
• (e^x)/(e^y) = e^(x-y)
• ln(x^b) = blnx
• Asinx + Bcosx = Csin(x+v) och √(A^2+B^2)*(A/√(A^2+B^2)*sinx+B/√(A^2+B^2)*cosx)
• a^2+b^2 = 1
• a = cos v
• b = sin v
• C = √(A^2+B^2)
• y=sinx = x=arcsiny
• arcsin(sinx) = x
• y=cosx = x=arccosy
• l e^it l = √(cos^2t + sin^2t) = 1
• e^z=e^x+iy = e^x(cosy+i*siny)
• Skriv Z på polär form re^iw
• cos t (eulers) = e^it+e^it/2
• Sin t (eulers) = e^it - e^-it/2i

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