Trigonometric Identities and Special Triangles |
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Summary |
there are some rules and formulae that are useful when problem solving using trigonometry. an identity is an equation which is true for all values of the variable.angles such as 30°, 45° and 60° are used frequently and the trigonometric ratios of these angles can be found from special triangles and given in fraction form. |
Key Skills |
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Vocabulary |
identity, trigonometry, sine, cosine, tangent, equilateral triangle, isosceles triangle. |