Trigonometry Terminology
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8 Terms
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Trigonometry
The study of triangles and their angles and side lengths
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Sine
The ratio of the leg opposite the angle to the hypotenuse
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Cosine
The ratio of the leg adjacent to the angle to the hypotenuse
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Tangent
The ratio of the leg opposite the angle to leg adjacent to the angle
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Angle of elevation
Formed by an observer’s sight line and a horizontal line when looking up at something
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Angle of depression
Formed by the observer’s sight line and a horizontal line when looking down at something
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Law of Sines
(sinA/a)=(sinB/b)=(sinC/c)
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Law of Cosines
a²=b²+c²-2bc(cosA)
b²=a²+c²-2ac(cosB)
c²=a²+b²-2ab(cosC)
Note 
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