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Sin £ = o/h
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Csc £ = h/o
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Tan £ = o/a
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Cot £ = a/o
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Cos £ = a/h
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Sec £ = h/a
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Sin £ = y/r
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Csc £ = r/y
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Cos £ = x/r
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Sec £ = r/x
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Tan £ = y/x
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Tan £ = x/y
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Degrees to Radians
Degree * [(πradians)/180]
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Radians to Degrees
Radian* [180/(πradians)]
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Initial Side The fixed ray of an angle
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Terminal Side The rotated ray of an angle
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Standard Position Angle whose vertex is on the origin and initial side lies on the x-axis
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Coterminal Two angles that have the same terminal side. Coterminal =
angle +/- [multiple of 360] |
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Radian The measure of an angle in standard position whose terminal side intercepts an arc of length r
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Sector A section of a circle bound by two radii
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Central Angle The internal angle of a sector
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Reference Angle the angle formed by the terminal side of another angle and the x-axis
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Arc Length
s = rß
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Area
0.5 x r^2 x ß
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Cheatography n. The art of mapping complex subjects into clear, instantly navigable reference guides.
