R2 Flashcards

1
Q

Aritmetisk rekke

A

an= a1+(n-1)d
Sn=(a1+an)/2 •n

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2
Q

Geometrisk rekke

A

an=a1•k^(n-1)
Sn=a1•(k^n -1)/(k-1)
S=a1/(1-k)

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3
Q

Derivasjon sin, cos, tan

A

(Sin x)’= cos x
(Cos x)’= -sin x
(Tan x)’= 1/cos^2 x = 1+tan^2 x

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4
Q

Integrasjon av trigonometiske funksjoner

A

Sin x dx = -cos x + C
Cos x dx = sin x + C
Tan x dx = -ln |cos x|+C

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5
Q

Integrasjonsmetoder

A

£u’•v dx = uv-£u•v’ dx
u’ = du/dx

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6
Q

Omdreiningslegemer

A

V = pi•£(f(x))^2 dx
A =2pi•£ f(x) sqrt(1+(f’(x))^2) dx

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7
Q

Trigonometiske identiteter

A

Cos^2 v + sin^2 v = 1
Sin 2v = 2 sin v cos v
Cos 2v = 2 cos^2 v - 1

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8
Q

Harmoniske svingninger

A

f(x)=A sin(cx+🌀)+d
T=2pi/c x.=🌀/c
Cosinus kurve: 🌐=🌀-2/pi

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