Formelsamling Flashcards

1
Q

Normalekvationen

A

A^TAx =A^Tb

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2
Q

Egenvärde

A

det(λI-A)=0

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3
Q

Egenvektor

A

(A-λI)x=0

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4
Q

Diagonalsering samt kontroll

A

AP=DP

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5
Q

Ortogonalprojektion

A

uv=||u||||v||

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6
Q

Skalärprodukten

A

uv=|u||v|cos0

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7
Q

Matrisinvers

A

A^-1A=AA^-1=I

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8
Q

Kryssprodukten

A

u x v

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9
Q

Avståndsformeln

A

Ax+By+Cz+D=0

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10
Q

Linjensekvation på normalform.

Beskriv syftet med den

A

två punkter och en normalvektor

blir alltså a(x-x0)+b(y-y0)=0

eller ax+by+c=0

Syftet är att se om en punkt ligger på linjen eller om en vektor är parallell med linjen.

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11
Q

Beräkningar av Area i rummet

A

A=|u||v|*sin0=|u x v|

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12
Q

Beräkning av volym i rummet

A

V=|u||v x w|cos0=|u(v x u)|

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13
Q

Beräkning av längden av en vektor

A

(v1,v2,v3)=√v1^2+v2^2+v3^2

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14
Q

Cosinussatsen

A

||u x v||^2=||u||^2+||v||^2=2||u||||v||*cos0

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15
Q

Den gemensamma formeln för egenvärd och egenvektor

A

Ax=λx

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16
Q

Projicera formeln

A

(uv/vv) v

17
Q

Matrisprodukten

A

AB=BA