Difference between revisions of "Trigonometry"
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(Sine: opposite over hypotenuse) |
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[[Image:Right triangle.PNG|right|A right triangle]]A way to remember the relationships is the mnemonic SOH-CAH-TOA ("soak a toe"). Think of a man soaking his toe in a tub of water - preferably a three-sided tub! | [[Image:Right triangle.PNG|right|A right triangle]]A way to remember the relationships is the mnemonic SOH-CAH-TOA ("soak a toe"). Think of a man soaking his toe in a tub of water - preferably a three-sided tub! | ||
| − | *Sine | + | *SOH: Sine = opposite over hypotenuse |
| − | *Cosine | + | *CAH: Cosine = adjacent over hypotenuse |
| − | *Tangent | + | *TOA: Tangent = opposite over adjacent |
==External links== | ==External links== | ||
*[http://id.mind.net/~zona/mmts/trigonometryRealms/introduction/rightTriangle/trigRightTriangle.html Trigonometry and Right Triangles] | *[http://id.mind.net/~zona/mmts/trigonometryRealms/introduction/rightTriangle/trigRightTriangle.html Trigonometry and Right Triangles] | ||
Revision as of 17:36, April 18, 2007
Trigonometry is the study of angles and triangles, relying heavily on three basic functions: sine, cosine and tangent. These functions are abbreviated as "sin", "cos" and "tan".
These functions are defined by reference to a "right triangle," which is a triangle in which one angle is 90 degrees.
A way to remember the relationships is the mnemonic SOH-CAH-TOA ("soak a toe"). Think of a man soaking his toe in a tub of water - preferably a three-sided tub!
- SOH: Sine = opposite over hypotenuse
- CAH: Cosine = adjacent over hypotenuse
- TOA: Tangent = opposite over adjacent