Circunferência Trigonométrica Flashcards

1
Q

Senos notáveis e sinais:

A
0 = 0
π/6 = 1/2
π/4 = √2/2
π/3 = √3/2
π/2 = 1
π = 0
3π/2 = -1
2π = 0

Positivo no 1º e 2º quadrantes.

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2
Q

Cossenos notáveis e sinais:

A
0 = 1
π/6 = √3/2
π/4 = √2/2
π/3 = 1/2
π/2 = 0
π = -1
3π/2 = 0
2π = 1

Positivo no 1º e 4º quadrantes.

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3
Q

Relação fundamental da trigonometria:

Relação arcos complementares:

A

sen²α + cos²α = 1

senα = cos(π/2 - α)

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4
Q

Tangente:

A

tgα = senα/cosα

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5
Q

Cotangente:

A

cotgα = cosα/senα ou 1/tgα

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6
Q

Cossecante:

A

cossecα = 1/senα

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7
Q

Secante:

A

secα = 1/cosα

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