Cheatography
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6 Trignometric Functions
Sin £ = o/h |
Csc £ = h/o |
Tan £ = o/a |
Cot £ = a/o |
Cos £ = a/h |
Sec £ = h/a |
General Definitions of the 6 Trig Functions
Sin £ = y/r |
Csc £ = r/y |
Cos £ = x/r |
Sec £ = r/x |
Tan £ = y/x |
Tan £ = x/y |
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Degrees to Radians
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Degrees to Radians Degree * [(πradians)/180]
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Radians to Degrees Radian* [180/(πradians)]
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Vocabulary
Initial Side The fixed ray of an angle |
Terminal Side The rotated ray of an angle |
Standard Position Angle whose vertex is on the origin and initial side lies on the x-axis |
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 |
Sector A section of a circle bound by two radii |
Central Angle The internal angle of a sector |
Reference Angle the angle formed by the terminal side of another angle and the x-axis |
Arc Length and Area of a Sector
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Arc Length s = rß
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Area 0.5 x r^2 x ß
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Sine Functions
Amplitude = |a|
Period = (2π)÷|b|
Graphing Cosine Functions
Amplitude = |a|
Period = (2π)➗|b|
Graphing a Tangent Function
Graphing a Cotangent Function
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