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# Objectives - PowerPoint PPT Presentation

Material Taken From: Mathematics for the international student Mathematical Studies SL Mal Coad , Glen Whiffen , John Owen, Robert Haese , Sandra Haese and Mark Bruce Haese and Haese Publications, 2004. Chapter 10 – Section A Right Triangle Trigonometry. Objectives.

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## Objectives

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Material Taken From:Mathematicsfor the international student Mathematical Studies SLMal Coad, Glen Whiffen, John Owen, Robert Haese, Sandra Haese and Mark BruceHaese and Haese Publications, 2004

Chapter 10 – Section A

Right Triangle Trigonometry

Objectives

To identify the trig ratios of a right triangle.

To find the missing side or angle of a right triangle.

opposite

hypotenuse

opp

hyp

1) In the diagram find:

the hypotenuse

side opposite angle A

side opposite angle C

Chapter 10 – Section B: Trigonometric Ratios

The Trigonometric Functions

SINE

COSINE

TANGENT

SOHCAHTOA

hyp

opp

2) For the triangle shown, find:

sin

cos

tan

Finding Sides:

Label the triangle with hyp, opp, adj,

Choose the correct ratio from SOHCAHTOA

Set up the equation

Solve.

Finding Angles:
• Label the triangle with hyp, opp, adj,
• Choose the correct ratio from SOHCAHTOA
• Set up the equation
• Solve by using the inverse.
• Calculator must be in DEGREE mode!

7)

8)

4

2.67

5.92

θ

θ

7

20

θ

21

10)

9)

2

5

Homework
• 10A, pg 318
• #1
• 10B.1, pg 319
• #1ace
• 10B.2, pg 321
• #2acegi, 3ac
• 10B.3, pg 323
• #1 acegi, 2a