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tangent (trigonometry)
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Tangent (trigonometry)
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In trigonometry, a function of an acute angle in a right-angled triangle, defined as the ratio of the length of the side opposite the angle to the length of the side adjacent to it; a way of expressing the gradient of a line. This function can be used to find either sides or angles in a right-angled triangle.
For example, to work out the height (h) of a 5-m ramp set at an angle of 8°:
The height of the ramp is 70 cm.
See also sine, cosine, tangent (graph), and tangent (circle).
© Research Machines plc 2008. All rights reserved. Helicon Publishing is a division of Research Machines plc.
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arc
chord (geometry)
circle
circle theorem
circumference
cone (geometry)
congruent
cosine
cross-section
cube (geometry)
cuboid
cylinder (geometry)
elevation, angle of
geometry
hexagon
octagon
parallelogram
pentagon
polygon
prism (mathematics)
pyramid (geometry)
Pythagoras' theorem
quadrant
quadrilateral
radius (mathematics)
rectangle
rhombus
sector (mathematics)
similar
similar triangles
sine
sphere
square
tangent (circle)
tangent (trigonometry)
tetrahedron
three-dimensional
trapezium
triangle (geometry)
trigonometry
two-dimensional
chord (geometry)
circle
circle theorem
circumference
cone (geometry)
congruent
cosine
cross-section
cube (geometry)
cuboid
cylinder (geometry)
elevation, angle of
geometry
hexagon
octagon
parallelogram
pentagon
polygon
prism (mathematics)
pyramid (geometry)
Pythagoras' theorem
quadrant
quadrilateral
radius (mathematics)
rectangle
rhombus
sector (mathematics)
similar
similar triangles
sine
sphere
square
tangent (circle)
tangent (trigonometry)
tetrahedron
three-dimensional
trapezium
triangle (geometry)
trigonometry
two-dimensional
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