Trigonometria Flashcards

1
Q

Triangulo

A

Figura geométrica que possui 3 lados e 3 angulos que somam 180º

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2
Q

Triangulo Retangulo

A

Apresenta um angulo raso entre 2 catetos e é oposto à hipotenusa.

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3
Q

Teorema de Pitágoras

A

Em um triangulo retângulo, a soma do quadrado dos catetos é igual ao quadrado da hipotenusa. A² = b² + c².

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4
Q

Seno de um angulo

A

Razão entre cateto oposto a um angulo e a hipotenusa Soh

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5
Q

Cosseno de um angulo

A

Razão entre cateto adjacente a um angulo e a hipotenusa Cah

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6
Q

Tangente de um angulo

A

Razão entre cateto oposto a um angulo e cateto adjacente ou razaão entre seno e coseno. Toa

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7
Q

Angulo Notável

A

São os ângulos cruciais a trigonometria: 30º,45º e 60º

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8
Q

Conversão de radianos para graus

A

Multiplica por 180 e divide por pi

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9
Q

Conversão de graus para radianos

A

Multiplica por pi e divide por 180.

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10
Q

sen(a) x sen(b)

A

1/2 x {cos(a-b) - cos(a+b)}

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11
Q

cos(a) x cos(b)

A

1/2 x {cos(a+b) + cos(a-b)}

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12
Q

cos(a + b)

A

cos(a) x cos(b) - sen(a) x sen(b).

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13
Q

sen(a + b)

A

sen(a) x cos(b) + sen(b) x cos(a)

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14
Q

sen²(a)

A

1/2 x (1 - cos(2a)

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15
Q

cos²(a)

A

1/2 x (1 + cos(2a)

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16
Q

cosec(a)

A

1/sen(a)

17
Q

sec(a)

A

1/cos(a)

18
Q

cotg(a)

A

1/tg(a) ou cos(a)/sen(a)

19
Q

tg(a)

A

sen(a)/cos(a)

20
Q

sen²(a) + cos²(a)

A

1

21
Q

tg²(a) + 1

A

sec²(a)

22
Q

1+ cotg²(a) =

A

cosec²(a)

23
Q

sen(2a)

A

2 x sen(a) x cos(a)

24
Q

cos(2a)

A

2 x cos²(a) - 1

25
Q

sen(-a)

A
  • sen(a) - Função impar
26
Q

cos(-a)

A

cos(a) - Função par

27
Q

tg(-a)

A

-tg(a) - Função Impar