= = = = = = | Trigonometry Formulas |
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a2 + o2 = h2 (Pythagorean theorem) | |||||||||
| sin = |
o | csc = |
1 | = | h | |||||
| h | sin |
o | ||||||||
| cos = |
a | sec = |
1 | = | h | |||||
| h | cos |
a | ||||||||
| tan = |
o | = | sin |
cot = |
1 | = | a | |||
| a | cos |
tan |
o | |||||||
 |
sin  |
= | sin  |
= | sin  |
(Law of Sines) | |
| a | b | c | |||||
| c2 = a2 + b2 - 2ab cos |
(Law of Cosines) | ||||||
| Known Sides and Angles | Example | |||
|---|---|---|---|---|
| All three sides (SSS) a, b, and c |
cos = |
b2 + c2 - a2 | ||
| 2bc | ||||
| Two sides and the angle included between them (SAS) b, , and c |
a2 = b2 + c2 - 2bc cos |
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| Two sides and an angle not included between them (SSA) a, b, and |
sin = |
b sin |
||
| a | ||||
| One side and two angles (SAA) a, , and |
b = | a sin |
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| sin |
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 |
= tan-1(slope of x)
x' = x cos + y sin
y' = -x sin + y cos
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This page is for INFORMATIONAL PURPOSES ONLY.
Page author: Dawn Rorvik (rorvikd@evergreen.edu)