basmatte
trigg ettan tack!
cos^2x + sin^2x = 1
sin2v
2sinvcosv
cos2v
cos^2v - sin^2v
sin(x-y)
sinxcosy-cosxsiny
sin(x+y)
sinxcosy+cosxsiny
cos(x-y)
cosxcosy+sinxsiny
cos(x+y)
cosxcosy-sinxsiny
sin^2(x/2)
(1-cosx)/2
cos^2(x/2)
(1+cosx)/2
cosinus satsen för a^2 , svar: a^2=...
a^2=b^2+c^2-2bccosA
cirkelns ekv?
(x-h)^2+(y-k)^2=r^2
parabel ekv?
ax^2+bx+c
hyperbel ekv?
(x^2/a^2)-(y^2/b^2)=1
ellips ekv
(x^2/a^2)+(y^2/b^2)=1
C(n,k) = ?
n!/(k!(n-k))
p(n,k) = ?
n!/(n-k)!
arit a_n =
a1 + (n-1)d
arit Sn =
n*((a1+an)/2)
geo a_n =
a1×k^(n-1)
geo Sn =
a1×((r^n-1)/(r-1))