An introduction to Trigonometry.

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An introduction to Trigonometry.

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This is an elementary introduction to everything trigonometry to come. Once you understand this part, you will not have any challenge whatsoever trigonometry.

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Tuesday, March 10, 2026 3:42 PM

Category Identity / Formula Notes / Usage
The Map Pythagoras (Radius is always
positive)
The Map Opposite/ Hypotenuse

The Map Adjacent/ Hypotenuse

The Map Slope

Quotient Use to simplify fractions

Square The "God" Identity

Square Derived from above

Square Derived from above

Double Angle Expanding a double angle

Double Angle Version 1

Double Angle Version 2 (Best for Half-Angles)

Double Angle Version 3 (Best for Half-Angles)

Compound Watch the signs

Compound Sign flips in the middle

Quadrant Angle Range Coordinates Positive Ratio
Q1 ALL ( )

TRIGONOMETRY Page 1

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Schooljaar: 200
Uploaded on: June 2, 2026
Number of pages: 3
Written in: 2025/2026
Type: Class notes
Professor(s): Ndlovu
Contains: All classes

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