Trigonometry
Trigonometry, abbreviated as TRIG, is a branch of mathematics that deals with the relations between the sides and angles of plane or spherical triangles.
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Trigonometry Glossary
A
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- Arccosine - arccos, the inverse cosine.
- Arccotangent - arccot , the inverse cotangent.
- Arccosecant - arccsc, the inverse cosecant.
- Arcsecant - arcsec , the inverse secant.
- Arcsine - arcsin , the inverse sine.
- Arctangent - arctan , the inverse tangent.
B
C
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- Cosecant - csc, the ratio of the hypotenuse over opposite side in a right triangle.
- Cosine - cos, the ratio of the adjacent side of the hypotenuse in a right triangle.
- Cotangent - cot, the ratio of the adjacent side to the oposite in a right triangle.
H
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- Heron's Formula - A formula for the area of a triangle when the lengths of the three sides are known.
- Hyporenuse - The side of right triangle opposite the right angle, which is the longest side.
I
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- Infinite - Having no boundary.
- Inverse Statement - Disaliow both the hypohesis and conclusion of the origional statement.
L
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- Law of Cosines - An equation relating to cosine of an interior angle and the lengths of the sides of a triangle.
- Law of Sines - The ratio of the sine of any angle within any specific triangle and the length for the opposite side is a constant.
O
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- Orthocenter - The point of concurrence of the altitudes of the triangle.
- Orthogonal - Perpendicular to a plane.
P
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- Pythagorean Theorem - An equation relating the lengths of the sides of a right triangle. The sum of the squares of the legs of a right triangle is equal to the square of the hypotenuse.
- Proportional - In a constant ratio.
R
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- Ratio - A constant proportion or two real numbers divided by each other.
S
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- Secant - sec, the ratio of the hypotenuse to the side adjacent to a given angle in a right triangle.
- Sine - sin, the ratio of the length of the opposite side to the length of the hypotenuse.
T
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- Tangent - The ratio of the opposite side to the adjacent side of a right triangle.
- Tangent Line - A line that touches the graph of the function at a single point.
- Tangent of a Circle - A line that contacts an arc or circle at only one point.
- Trig Functions - sine, cosine, tangent, cosecant, secant, and cotangent
X
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- X-axis - The horizontal axis on a coordinate system.
Y
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- Y-axis - The vertical axis on a coordinate system.
Tags: Glossaries