# Trigonometry

## Law of sines

Learn
Solving for a side with the law of sinesSolving for an angle with the law of sinesProof of the law of sines
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 cosinesSolving for an angle with the law of cosinesProof of the law of cosines
Practice
Solve triangles using the law of cosinesGet 3 of 4 questions to level up!

## Solving general triangles

Learn
Trig word problem: starsLaws of sines and cosines review
Practice
General triangle word problemsGet 3 of 4 questions to level up!

## Unit circle introduction

Learn
Unit circleThe trig functions & right triangle trig ratiosTrig unit circle review
Practice
Unit circleGet 3 of 4 questions to level up!

Learn
Practice
Radians & degreesGet 3 of 4 questions to level up!
Unit circle (with radians)Get 3 of 4 questions to level up!

## The Pythagorean identity

Learn
Proof of the Pythagorean trig identityUsing the Pythagorean trig identityPythagorean identity review
Practice
Use the Pythagorean identityGet 3 of 4 questions to level up!

## Trigonometric values of special angles

Learn
Trig values of special angles
Practice
Trig values of special anglesGet 3 of 4 questions to level up!

## Graphs of sin(x), cos(x), and tan(x)

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

## Amplitude, midline, & period

Learn
Features of sinusoidal functionsMidline, amplitude, and period review
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!
Period of sinusoidal functions from graphGet 3 of 4 questions to level up!

## Transforming sinusoidal graphs

Learn
Amplitude & period of sinusoidal functions from equationTransforming sinusoidal graphs: vertical stretch & horizontal reflectionTransforming sinusoidal graphs: vertical & horizontal stretches
Practice
Amplitude of sinusoidal functions from equationGet 3 of 4 questions to level up!
Midline of sinusoidal functions from equationGet 3 of 4 questions to level up!
Period of sinusoidal functions from equationGet 3 of 4 questions to level up!

## Graphing sinusoidal functions

Learn
Sinusoidal function from graph
Practice
Graph sinusoidal functionsGet 3 of 4 questions to level up!
Construct sinusoidal functionsGet 3 of 4 questions to level up!
Graph sinusoidal functions: phase shiftGet 3 of 4 questions to level up!

## Sinusoidal models

Learn
Trig word problem: modeling daily temperatureTrig word problem: modeling annual temperatureTrig word problem: length of day (phase shift)
Practice
Modeling with sinusoidal functionsGet 3 of 4 questions to level up!
Modeling with sinusoidal functions: phase shiftGet 3 of 4 questions to level up!