# Basic Trigonometry - PowerPoint PPT Presentation

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## Basic Trigonometry

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### Basic Trigonometry An Introduction Right Triangle Anatomy The legs are the 2 sides that form the right angle The side opposite the right angle is called the hypotenuse. – PowerPoint PPT presentation

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Title: Basic Trigonometry

1
Basic Trigonometry
• An Introduction

2
Right Triangle Anatomy
• The legs are the 2 sides that form the right
angle
• The side opposite the right angle is called the
hypotenuse.

hypotenuse
leg
leg
3
Trigonometry
4
Ratio Definitions
• Sin opposite leg / hypotenuse
• Cos adjacent leg / hypotenuse
• Tan opposite leg / adjacent leg

5
Reciprocals
6
Reciprocal Ratio Definitions
• Cot 1 / Tan
• Sec 1 / Cos
• Csc 1 / Sin

7
Alternate Reciprocal Definitions
• Cot adjacent leg / opposite leg
• Sec hypotenuse / adjacent leg
• Csc hypotenuse / opposite leg

8
Examples
Y
• Sin X b / c
• Cos X a / c
• Tan X b / a

C
b
X
a
9
Reciprocal Examples
Y
• Cot X a / b
• Sec X c / a
• Csc X c /b

c
b
X
a