Chapter 5 Flashcards by Hannah Fekete

Q

sinθ

Sine Ratio

A

Opposite/Hypotenuse

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Q

cosθ

Cosine Ratio

A

Adjacent/Hypotenuse

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Q

tanθ

Tanget Ratio

A

Opposite/Adjacent

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Q

60 minutes

In degrees

A

1 degree

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Q

60 seconds

In minutes

A

1minute

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Q

Sine Rule

A

sinA/a = sinB/b = sinC/c

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Q

Cosine Rule

A

c²=a²+b²-2abcos(C)

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Q

Area of a triangle

A

A=1/2 * a b sinC

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Q

degrees -> radians

A

. * π/180

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Q

radians -> degrees

A

/ π/180 or * 180/π

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Q

Length of an arc

radians

A

l=rθ

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Q

Length of an arc

degrees

A

l = θ/360 * 2πr

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Q

Area of a sector

radians

A

A = 1/2 r²θ

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Q

Area of a sector

degrees

A

A = θ/360 π r²

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Q

Ambiguous case

A

θ, 180-θ

For 2 sides and non included angle.

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