Formulas Trigonometria Flashcards

1
Q

Teorema del sinus

A

costat x / sinus x = costat y / sinus y = costat x / sinus x

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2
Q

Teorema del cosinus

A

costat a exp2 = suma dels costats bc exp 2 - 2 per bc per cosinus a

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3
Q

sinus alpha + beta

A

sinus a * cos b + cos a * sin b

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4
Q

cosinus alpha + beta

A

cos a * cos b - sin a * sin b

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5
Q

tangent alpha + beta

A

tg a + tg b / 1 - tg a * tg b

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6
Q

sinus alpha - beta

A

sin a * cos b - cos a * sin b

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7
Q

cos a - b

A

cos a * cos b + sin a * sin b

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8
Q

tangent a - b

A

tg a - tg b / 1 + tg a * tg b

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9
Q

sin 2a

A

2 * sin a * cos a

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10
Q

cos 2a

A

cos e2 a - sin e2 a

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11
Q

tg 2a

A

2 * tg a / 1 - tg e2 a

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12
Q

sin a/2

A

arrel de 1 - cos a / 2

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13
Q

cos a/2

A

arrel de 1 + cos a / 2

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14
Q

tg a / 2

A

arrel de 1 - cos a / 1 + cos a

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15
Q

sin a + sin b

A

2sin (a+b) / 2 cos (a-b) / 2

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16
Q

sin a - sin b

A

2cos (a+b)/2 sin (a-b) / 2

17
Q

cos a + cos b

A

2* cos (a+b)/2 * cos (a-b)/2

18
Q

cos a - cos b

A

-2*sin (a+b)/2 * sin (a-b)/2

19
Q

cotan

A

1/tan

20
Q

sec

A

1/cos

21
Q

cosec

A

1/sin