trigonomotry references
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Last updated 4:37 AM on 4/3/23
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25 Terms
1
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circumference of a circle
2πr
2
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arc length
θ/2π or 360° x 2πr
3
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sector area
θ/2π or 360° x 2πr²
4
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cos²θ + sin²θ =
1
5
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1 + tan²θ =
sec²θ
6
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1 + cot²θ =
csc²θ
7
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45°-45°-90°
hypotenuse = leg x √2
8
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30°-60°-90°
long leg = short leg x √3 or hypotenuse = short leg x √2
9
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0/2π
0/360° (1,0)
10
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π/6
30° (√3/2, 1/2)
11
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π/4
45° (√2/2, √2/2)
12
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π/3
60° (1/2, √3/2)
13
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π/2
90° (0, 1)
14
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2π/3
120° (-1/2, √3/2)
15
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3π/4
135° (-√2/2, √2/2)
16
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5π/6
150° (-√3/2, 1/2)
17
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π
180° (-1, 0)
18
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7π/6
210° (-√3/2, -1/2)
19
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5π/4
225° (-√3/2, 1/2)
20
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4π/3
240° (-1/2, -√3/2)
21
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3π/2
270° (0, -1)
22
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5π/3
300° (1/2, -√3/2)
23
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7π/4
315° (√2/2, -√2/2)
24
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11π/6
315° (√3/2, -1/2)
25
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f(x)=
a x trig(w(x-h))+k