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Period in Degrees

Part of the Graphs of Trig Functions section of Coddy's Trigonometry journey. Lesson 18 of 51.

On a degree axis a full lap is 360°, so the period of sin(b×x) is 360°/b. The wave y = sin(2x) repeats every 180°: it rises to its top at 45°, crosses the axis at 90°, reaches its bottom at 135° and finishes the wave at 180°.

$y = sin 2x on a degree axis, period 180 degrees$

The quarter points of a wave are where to put your dots: start, top, middle, bottom, end, each a quarter period apart. With a period of 180° they are 45° apart.

Challenge

Draw the graph on the goal row on the degree axis. Press Check.

Try it yourself

y=cos(3x)

Draw the graph

Test yourself

This lesson includes a short quiz. Start the lesson to answer it and track your progress.

All lessons in Graphs of Trig Functions

1From Circle to Wave

Ride a Ferris Wheel Height on the Unit Circle Unrolling the Sine Graph The Sine Graph in Radians Circle to Wave Recap

4Period

Period: One Wave Long Stretching the WavePeriod in Degreesb Is Not the Period Period Recap

7Reading a Graph

The Equation of a Wave Sine or Cosine?From Peaks to a Wave All Four at Once Reading Recap

10Final Challenges

A Wave From Its Facts A Hidden Shift A Flipped Tangent Read the Whole Wave Giant Wheel: the Model Giant Wheel: the Height

2The Cosine Graph

Cosine: the Point's x The Cosine Graph Cosine Is a Shifted Sine Where Sine Meets Cosine Cosine Graph Recap

5Midline

The Midline From Highest and Lowest Reading the Midline Midline Recap

8The Tangent Graph

The Tangent Graph Asymptotes Stretching the Tangent Graphs of sec, csc and cot Tangent Recap

3Amplitude

Amplitude: How Tall Amplitude of a Cosine A Negative a Flips It Amplitude From a Graph Amplitude Recap

6Phase Shift

Phase Shift: Sliding Phase Shift in Degrees Factor Out b First Reading a Phase Shift Phase Shift Recap

9Modelling with Waves

A Ferris Wheel Model Daylight Over a Year Tides Using a Model A Spring's Bounce Modelling Recap