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Section B.3 Trigonometry Reference
Subsection B.3.1 Definitions of the Trigonometric Functions
Unit Circle Definition.
\(\sin \theta = y\) |
\(\cos \theta = x\) |
|
\(\ds\csc \theta = \frac1y\) |
\(\ds\sec \theta = \frac1x\) |
|
\(\ds\tan \theta = \frac yx\) |
\(\ds\cot \theta = \frac xy\) |
Right Triangle Definition.
\(\ds\sin \theta = \frac{\text{O} }{\text{H} }\) |
\(\ds\csc \theta = \frac{\text{H} }{\text{O} }\) |
|
\(\ds\cos \theta = \frac{\text{A} }{\text{H} }\) |
\(\ds\sec \theta = \frac{\text{H} }{\text{A} }\) |
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\(\ds\tan \theta = \frac{\text{O} }{\text{A} }\) |
\(\ds\cot \theta = \frac{\text{A} }{\text{O} }\) |
Subsection B.3.2 Common Trigonometric Identities
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