Fonctions circulaires et hyperboliques Flashcards

1
Q

cos²(x)+sin²(x)

A

1

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2
Q

tan(x)

A

sin(x)/cos(x)

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3
Q

coordonnées polaires (C,O) -> (x,y) ?

A

x = C cos(O)
y = C sin(O)

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4
Q

Coordonnées cartésienne -> (C,O)

A

C = √(x² + y²)
tan(O) = y/x

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5
Q

Domaine de définition de tan ?

A

D = R / {π/2 + kπ , k € Z}
ou
D = U ] -π/2 + kπ ; π/2 + kπ [

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6
Q

cos(a+b)

A

cos(a)cos(b) - sin(a)sin(b)

Retenir : coco - sisi

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7
Q

sin(a+b)

A

sin(a)cos(b) + cos(a)sin(b)

Retenir : sico + cosi

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8
Q

tan(a+b)

A

(tan(a)+tan(b))/(1-tan(a)tan(b))

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9
Q

formule de duplication :

cos(2a)

A

cos²(a) - sin²(a)
ou
2cos²(a) - 1
ou
1 - 2sin²(a)

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10
Q

formule de duplication :

sin(2a)

A

2sin(a)cos(a)

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11
Q

formule de duplication :

tan(2a)

A

(2tan(a))/(1-tan²(a)

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12
Q

sin(-x)

A

-sin(x)

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13
Q

Période de sin ?

A

sin est 2π-periodique

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14
Q

cos(-x)

A

cos(x)

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15
Q

Période de cos ?

A

2π-periodique

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16
Q

tan(-x)

A

-tan(x)

17
Q

Période de tan ?

A

tan est π-periodique

18
Q

tan′(x)

A

1/cos²
OU
1 + tan²

19
Q

lim sin(x)/x
x->0

A

1 = sin′(0)

20
Q

lim (cos(x)-1)/x
x->0

A

0 = cos′(0)

21
Q

lim tan(x)/x
x->0

A

1 = tan′(0)

22
Q

sh(x)

A

(exp(x)-exp(-x))/2

23
Q

ch(x)

A

(exp(x)+exp(-x))/2

24
Q

th(x)

A

sh(x)/ch(x)

25
Q

sh(-x)

A

-sh(x)

26
Q

ch(-x)

A

ch(x)

27
Q

th(-x)

A

-th(x)

28
Q

sh′

A

ch

29
Q

ch′

A

sh

30
Q

th′

A

1/ch²
OU
1 - th²

31
Q

ch² - sh²

A

1