Trigo Flashcards

1
Q

cos (−x)

type

A

cos (x)

angles opposés

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2
Q

sin (−x)

type

A

− sin (x)

angles opposés

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3
Q

cos (π − x)

type

A

− cos (x)

angles supplémentaires

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4
Q

sin (π − x)

type

A

sin (x)

angles supplémentaires

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5
Q

cos (π + x)

type

A

− cos (x)

angles qui diffèrent de pi

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6
Q

sin (π + x)

type

A

− sin (x)

angles qui diffèrement de pi

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7
Q

cos (π /2 − x)

type

A

sin (x)

angles complémentaires

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8
Q

sin (π/2 − x)

type

A

cos (x)

angles complémentaires

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9
Q

cos (π/2 + x)

type

A

− sin (x)

angles qui diffèrent de pi/2

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10
Q

sin (π/2 + x)

type

A

cos (x)

angles qui diffèrent de pi/2

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11
Q

cos (a + b)

A

cos a cos b − sin a sin b

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12
Q

sin (a + b)

A

sin a cos b + sin b cos a

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13
Q

cos (a − b)

A

cos a cos b + sin a sin b

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14
Q

sin (a − b)

A

sin a cos b − sin b cos a

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15
Q

cos 2a

A

cos^2 a − sin^2 a = 2cos^2 a − 1= 1 − 2sin^2 a

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16
Q

sin 2a

A

2sin a cos a

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17
Q

cos^2 a

A

(1 + cos 2a) / 2

18
Q

sin^2 a

A

(1− cos 2a) / 2

19
Q

dérivée de :

sin’ x

A

cos x

20
Q

dérivée de :

cos’ x

A

− sin x

21
Q

dérivée de :

tan’ x

A

1/cos^2 x
1 + tan^2 x

22
Q

dérivée de :

sin u

A

u’ cos u

23
Q

dérivée de :

cos u

A

− u’ sin u

24
Q

dérivée de :

tan u

A

u’/ cos^2 u
u’(1 + tan^2 u)

25
Q

dérivée de :

sin^n (x)

A

n sin^n-1 (x) × cos (x)

26
Q

dérivée de :

cos^n (x)

A

− n cos^n-1 (x) × sin (x)

27
Q

dérivée de :

tan^n (x)

A

n tan^n-1 (x) × (1 + tan^2 (x) )

28
Q

dérivée de :

1/cos (x)

A

− cos (x) / sin^2 (x)

29
Q

dérivée de :

1/sin (x)

A

sin (x) / cos^2 (x)

30
Q

cos (a) × sin (b)

A

1/2 [ sin (a+b) + sin (a-b) ]

31
Q

équation trigo

cos x = cos a

A

x = a [2π]
x = - a [2π]

32
Q

équation trigo

sin x = sin a

A

x = a [2π]
x = π - a [2π]

33
Q

équation trigo

tan x = tan a

A

x = a [π]

34
Q

tan (a+b)

A

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

35
Q

tan (a-b)

A

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

36
Q

cos ^2 a/2

A

(1 + cos a) / 2

37
Q

sin ^2 a/2

A

(1 - cos a) /2

38
Q

tan 2a

A

2tan a / (1-tan^2 a)

39
Q

somme produit

cos p + cos q

A

2 cos (p+q/2) cos (p-q/2)

40
Q

somme produit

cos p - cos q

A

➖ 2 sin (p+q/2) sin (p-q/2)

41
Q

sin p + sin q

A

2 sin (p+q/2) cos (p-q/2)

42
Q

sin p - sin q

A

2 cos (p+q/2) sin (p-q/2)