Right Triangle Trios and Increasing and Decreasing and Even and Odd Trig and Reference Angle Formulas and Principal Conterminal Angle Calculator Formula and More

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24 Terms

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2
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5

12 13

3
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8

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20

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QII

Sin - Cos - Tan +

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QIV

Sin + Cos + Tan +

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Cos

Even

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Sin

Odd

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Tan

Odd

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Sec

Even

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Csc

Odd

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QI reference angle

reference angle = theta

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QII reference angle

reference angle = 180d - theta or pi - theta

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QIII reference angle

reference angle = theta - 180d or theta - pi

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Trig absolute value formula

()trig(angle)() = trig(reference angle)

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Principal Conterminal Angle Calculator Formula

pct(x):= x-floor(x/360)*360

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7

24 25

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QI

Sin + Cos - Tan +

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QIII

Sin - Cos + Tan +

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Cot

Odd

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QIV reference angle

reference angle = 360d - theta or 2pi - theta

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pi/6 point

(sqrt(3)/2, 1/2)

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pi/4 point

(sqrt(2)/2, sqrt(2)/2)

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pi/3 point

(1/2, sqrt(3)/2)