Pre-Cal Unit 3 (The Unit Circle)

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Pre-Calculus

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23 Terms

1
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Reference Angle
the acute angle between the terminal side of an angle and the x-axis
2
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an angle whose terminal side lies ON an axis
What angle does not have a reference angle?
3
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counter-clockwise
Positive angles rotate
4
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clockwise
Negative angles rotate
5
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π Radians
180 degrees equals
6
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yes
Are reference angles ALWAYS positive?
7
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SOH CAH TOA
REMEMBER
8
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csc (cosecant)
Reciprocal of sin is....
9
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sec (secant)
Reciprocal of cos is...
10
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cot (cotangent)
Reciprocal of tan is....
11
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π/6
30 degrees equals
12
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π/4
45 degrees equals
13
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π/3
60 degrees equals
14
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1, 2, 3, 3, 2, 1
moving from left to right in the chart, numerator numbers are..
15
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2
the sin and cos denominators are
16
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1/2 so sin(π/6) and cos(π/3)
Square root everything but..
17
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1/sqrt3, 1, sqrt 3
the tan row is
18
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A, S, T, C
order of positives by quadrant moving from QI to QIV
19
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All Students Take Calculus
saying to help remember the order of positives by quadrant
20
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cos, sin, and tan are positive
QI
21
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sin is positive, cos and tan are negative
QII
22
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tan is positive, sin and cos are negative
QIII
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cos is positive, sin and tan are negative
QIV