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Trigonometry Section 4.3

Trigonometry Section 4.3. Right Triangle Trigonometry. Special Right Triangles. A unit circle has a radius of _____. The hypotenuse is _____ of a triangle. The hypotenuse of the triangles inside the unit circle has a length of _____. Special triangle 30-60-90 Special triangle 45-45-90

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Trigonometry Section 4.3

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  1. Trigonometry Section 4.3 Right Triangle Trigonometry

  2. Special Right Triangles • A unit circle has a radius of _____. • The hypotenuse is _____ of a triangle. • The hypotenuse of the triangles inside the unit circle has a length of _____. • Special triangle 30-60-90 • Special triangle 45-45-90 • Fill in the unit circle.

  3. SOHCAHTOA • SOHCAHTOA is an acronym to help us remember the right triangle definitions. • S stands for _____. • C stands for _____. • T stands for _____. • O stands for _____. • A stands for _____. • H stands for _____.

  4. Right Triangle Definitions of Trig Functions • Therefore, SOH means _____. • CAH means _____. • TOA means _____. • Adjacent and opposite are terms relative to the _____. • Sine, cosine, and tangent are ratios of triangles. • So why are sine and cosine always between -1 and 1?

  5. Evaluating Trig Functions • Ex 1 • Memorize all identities • Reciprocal identities • Quotient identities • Pythagorean identities • Ex 4 • Ex 5 • Ex 7

  6. Homework • Worksheets 3 & 4 • 1-60, Applications 61-66

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