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Chapter 5/6 Review Trigonometry

Chapter 5/6 Review Trigonometry. Opposite. A. Adjacent. Right Angle Trigonometry. These relationships can only be used with a 90 o angle. SOH CAH TOA can be used to help remember the ratios. Hypotenuses. Example 1: Calculating a Side. Decide which angle and which 2 sides to use

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Chapter 5/6 Review Trigonometry

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  1. Chapter 5/6 ReviewTrigonometry

  2. Opposite A Adjacent Right Angle Trigonometry • These relationships can only be used with a 90o angle. • SOH CAH TOA can be used to help remember the ratios Hypotenuses

  3. Example 1: Calculating a Side • Decide which angle and which 2 sides to use • In this case angle = 40, opp = 5, hyp = x • opp and hyp is sin • flip the fractions to get x in the top • cross multiply

  4. Example 2: Calculating an Angle • Decide which angle and which 2 sides to use • In this case angle = A, adj = 5, hyp = 7 • adj and hyp is cos • use cos-1 to calculate an angle

  5. Non-Right Angle Trigonometry SIN LAW OR • Side a is opposite angle A, side B opposite angle b, etc • To use sin law, you must know one side-angle pair and you must also know one other side.

  6. Examples : Sin Law

  7. COS LAW Used when you do not have a side-angle pair

  8. Examples : Cos Law

  9. Chapter 5 – Primary Trig Ratios and Similar Triangles Chapter 6 – Trig for Non-Right Angle Triangles

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