Chapt 12 Math

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IB Mathematics: Analysis and Approaches (HL)

Geometry and trigonometry

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13 Terms

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Radian

Measurement of an angle with its vertex at the center of the circle

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Sector

The region enclosed by two radii and an arc

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Arc

A part of the circumference of a circle 

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Chord

The line segment joining two points on the circumference of a circle

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Segment

is the region between a chord and an arch 

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Vertex

The center point from where the sides emerge

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Initial side

Positive x axis always

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Terminal side

Can be any axis or quadrent depending on size of angle

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Coterminal angles

Think the larger angle of the segment (cycled the other way round)

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Sinθ

sin(180-θ)

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cosθ

cos(-θ)

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tanθ

tan(180 + θ)

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Identity 

An identity is an equation that is always true