Matematica B Flashcards

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1
Q

Quando é utilizado a lei do seno

A

Quando tiver 2 ângulos e 1 lado

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2
Q

Quando é utilizado a lei do cosseno

A

Quando tiver 1 ângulo e 2 lados

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3
Q

Formula do seno da soma ou diferença

A

sen(a+/b) =
sen a.cos b +/- sen b .cos a

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4
Q

Formula da tangente da soma ou da diferença

A

Tg(a+b) =
Tg a+Tg b/ 1 - Tga.Tgb
Tg(a-b) =
Tga - Tgb/1+ Tga.Tgb

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5
Q

Formula do cosseno da soma ou da diferença

A

Cos(a+b)= sena.senb -cosa.cosb
cos(a-b)= sena.senb +cosa.cosb

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6
Q

Formula do arco duplo do seno

A

Sen2.X= 2senx.cosx

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7
Q

Formula do arco duplo do cosseno

A

Cos2x= cos²x - sen²x

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8
Q

Formula do arco duplo da tangente

A

Tg2x= 2Tgx/1-Tg²x

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9
Q

Quando é uma função par?

A

Quando seu gráfico é simétrico em relação ao eixo Y

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10
Q

Fórmula da distância entre pontos

A

d= √ (Δx)²+ (Δy)²

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11
Q

Fórmula do ponto médio

A

Xm =Xa+Xb/2
Ym = Ya+Yb/2

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12
Q

como achar os pontos do baricentro?

A

Xg=Xa+Xb+Xc/3
Yg=Ya+Yb+Yc/3

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