Trigonometric Functions cram

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11 Terms

1
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What is the formula to convert degrees to radians?

multiply degrees by π/180​

2
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SOH-CAH-TOA

It stands for Sine = Opposite/Hypotenuse, Cosine = Adjacent/Hypotenuse, Tangent = Opposite/Adjacent.

3
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Do SOH_CAH_TOA rules apply to all triangles?

No, only to right triangles

4
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What is the pythagorean identity for sine and cosine?

A: sin²(x) + cos²(x)=1

5
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What is the pythagorean identity involving tangent?

1+tan²(x)=sec²(x)

6
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What is the pythagorean identity involving cotangent?

1+cot²(x)=csc²(x)

7
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What is the reciprocal identity for sine?

csc(x)=1/sin(x)

8
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What is the reciprocal identity for tangent?

cot(x)=1/tan(x)

9
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What is the law of Sines?

sinA/a=sinB/b=sinC/c

10
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What is the law of Cosines?

c²=a²+b²-2abcos(C)

11
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 What is the coordinate for 0° / 0 radians?

(1,0)