Terms and Formulae
Adjacent Side
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The leg of a right triangle that is not opposite a given angle.
Angle of Depression
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The positive acute angle formed by a horizontal surface and a
vector extending below it.
Angle of Elevation
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The positive acute angle formed by a horizontal surface and a
vector extending above it.
Hypotenuse
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The side of a right triangle opposite the right angle.
Opposite Side
-
The side of a right triangle opposite a given angle.
Formulas
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Cosecant
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Let A be an acute angle in Triangle ABC;
csc(A) = 
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Cosine
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Let A be an acute angle in Triangle ABC;
cos(A) = 
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Cotangent
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Let A be an acute angle in Triangle ABC;
cot(A) = 
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Secant
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Let A be an acute angle in Triangle ABC;
sec(A) = 
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Sine
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Let A be an acute angle in Triangle ABC;
sin(A) = 
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Tangent
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Let A be an acute angle in Triangle ABC;
tan(A) = 
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