TRIGONOMETRIA Flashcards

1
Q

ARCOS DUPLOS:
Sen(2a)
cos(2a)
Tg(2a)

A

sen(2a) = 2.sen(a).cos(a)
cos(2a) = cos^2(a) - sen^2(a)
tg(2a) = 2.Tg(a)/1-Tg^2(a)

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2
Q

RELAÇÃO FUNDAMENTAL DA TRIGONOMETRIA?

A

SEN^2(a) + COS^2(a) = 1

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3
Q

ARCOS COMPLEMENTARES:
SEN(x)/COS(x)/TG(x)

A

SEN(x) = COS(90-x)
COS(X) = SEN(90-x)
TG(x) = 1/TG(90-x)

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4
Q

COSSECANTE
SECANTE
COTANGENTE

A

COSSECANTE = 1/SEN(x)
SECANTE = 1/COS(x)
COTANGENTE = 1/TG(x) ou COS(x)/SEN(x)

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5
Q

RELAÇÃO DE SEN(x) COM COS(x)?

A

SEN(+-b/a) = cos(√a^2 +b^2/a)

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6
Q

SEN(a+-b)
COS(a+b)/COS(a-b)
TG(a+b)/TG(a-b)

A

Sen(a+-b) = sena.cosb +- senb.cosa
Cos(a+b) = cosa.cosb - sena.senb
Cos(a-b) cosa.cosb + sena.senb
Tg(a+b) = tga + tgb/1-tga.tgb
Tg(a-b) = tga-tgb/1+tga.tgb

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7
Q

EQUAÇÃO TRIGONOMÉTRICA:
senx = senθ
cosx = cosθ
tgx = tgθ

A

senx = senθ: x = θ + 2Kpi ou x = (pi - θ) + 2Kpi
cosx = cosθ: x = θ ou 2pi - θ
tgx = tgθ: x = θ + Kpi

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8
Q

FUNÇÃO SENO/PERIODO/DOMÍNIO/IMAGEM/PARIDADE?

A

F(x) = senx
2pi
Reais
[-1;1]
Ímpar

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9
Q

FUNÇÃO COSSENO/PERIODO/DOMÍNIO/IMAGEM/PARIDADE?

A

F(x) = cosx
2pi
Reais
[-1;1]
Par

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10
Q

FUNÇÃO TANGENTE/PERIODO/DOMÍNIO/IMAGEM/PARIDADE?

A

F(x) = tgx
pi
{x ∈ R / x ≠ pi/2 + Kpi
Im= Reais
Ímpar

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11
Q

FUNÇÃO TRIGONOMÉTRICA?
(lei de formação)

A

f(x) = a+b.sen(c.x +d)
ou
f(x)= a+b.cos(cx=d)

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12
Q

IMAGEM TRIGONOMÉTRICA?

A

[a - b; b + a]
se “b” maior que “a”
[a + b; a - b]

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13
Q

PERIODO TRIGONOMÉTRICO?

A

2pi/|c|

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