| Summary: | This lesson begins with angles in standard position, co terminal angles and principal angles. The six trigonometric ratios are defined for an angle in standard position and the CAST rule is introduced. The lesson concludes with finding reference angles.
After this lesson, you will be able to:
- understand the initial arm, terminal arm, and quadrantal angles.
- draw positive and negative angles in standard position.
- find positive and negative angles co terminal with a given angle.
- find the principal angle.
- find the six trigonometric ratios sine, cosine, tangent, cosecant, secant, cotangent sin cos tan csc sec ctn or cot of an angle in standard position in all four quadrants.
- use the CAST rule to determine in which quadrants the primary trig functions are positive.
- find reference angles.
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