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Trigonometry

Law of sines

Learn
Solving for a side with the law of sines
(Opens a modal)
Solving for an angle with the law of sines
(Opens a modal)
Proof of the law of sines
(Opens a modal)
Practice
Solve triangles using the law of sinesGet 3 of 4 questions to level up!

Law of cosines

Learn
Solving for a side with the law of cosines
(Opens a modal)
Solving for an angle with the law of cosines
(Opens a modal)
Proof of the law of cosines
(Opens a modal)
Practice
Solve triangles using the law of cosinesGet 3 of 4 questions to level up!

Solving general triangles

Learn
Trig word problem: stars
(Opens a modal)
Laws of sines and cosines review
(Opens a modal)
Practice
General triangle word problemsGet 3 of 4 questions to level up!

Introduction to radians

Learn
Intro to radians
(Opens a modal)
Radians & degrees
(Opens a modal)
Degrees to radians
(Opens a modal)
Radians to degrees
(Opens a modal)
Radian angles & quadrants
(Opens a modal)
Practice
Radians & degreesGet 3 of 4 questions to level up!

Unit circle definition of sine, cosine, & tangent

Learn
Unit circle
(Opens a modal)
The trig functions & right triangle trig ratios
(Opens a modal)
Trig unit circle review
(Opens a modal)

Graphs of sine, cosine, & tangent

Learn
Graph of y=sin(x)
(Opens a modal)
Graph of y=tan(x)
(Opens a modal)
Intersection points of y=sin(x) and y=cos(x)
(Opens a modal)

Basic trigonometric identities

Learn
Sine & cosine identities: symmetry
(Opens a modal)
Tangent identities: symmetry
(Opens a modal)
Sine & cosine identities: periodicity
(Opens a modal)
Tangent identities: periodicity
(Opens a modal)

Trigonometric values of special angles

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Trig values of special angles
(Opens a modal)
Practice
Trig values of special anglesGet 3 of 4 questions to level up!

Pythagorean identity

Learn
Proof of the Pythagorean trig identity
(Opens a modal)
Using the Pythagorean trig identity
(Opens a modal)
Pythagorean identity review
(Opens a modal)
Practice
Use the Pythagorean identityGet 3 of 4 questions to level up!

Introduction to amplitude, midline, & extrema of sinusoidal functions

Learn
Features of sinusoidal functions
(Opens a modal)
Practice
Midline of sinusoidal functions from graphGet 3 of 4 questions to level up!
Amplitude of sinusoidal functions from graphGet 3 of 4 questions to level up!

Finding amplitude & midline from formula

Learn
Amplitude & period of sinusoidal functions from equation
(Opens a modal)
Practice
Midline of sinusoidal functions from equationGet 3 of 4 questions to level up!
Amplitude of sinusoidal functions from equationGet 3 of 4 questions to level up!

Period of sinusoidal functions

Learn
Amplitude & period of sinusoidal functions from equation
(Opens a modal)
Midline, amplitude, and period review
(Opens a modal)
Practice
Period of sinusoidal functions from graphGet 3 of 4 questions to level up!
Period of sinusoidal functions from equationGet 3 of 4 questions to level up!

Graphing sinusoidal functions

Learn
Transforming sinusoidal graphs: vertical stretch & horizontal reflection
(Opens a modal)
Transforming sinusoidal graphs: vertical & horizontal stretches
(Opens a modal)
Practice
Graph sinusoidal functionsGet 3 of 4 questions to level up!

Constructing sinusoidal functions

Learn
Sinusoidal function from graph
(Opens a modal)
Trig word problem: modeling daily temperature
(Opens a modal)
Trig word problem: modeling annual temperature
(Opens a modal)
Practice
Construct sinusoidal functionsGet 3 of 4 questions to level up!
Modeling with sinusoidal functionsGet 3 of 4 questions to level up!

About this unit

Learn about the definition of the basic trigonometric functions (sin(x), cos(x), and tan(x)), and use advanced trigonometric functions for various purposes.