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Trigonometry
Science
Anatomy & Physiology
Astronomy
Astrophysics
Biology
Chemistry
Earth Science
Environmental Science
Organic Chemistry
Physics
Math
Algebra
Calculus
Geometry
Prealgebra
Precalculus
Statistics
Trigonometry
Humanities
English Grammar
U.S. History
World History
... and beyond
Socratic Meta
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Right Triangles
The Pythagorean Theorem
Special Right Triangles
Basic Trigonometric Functions
Solving Right Triangles
Measuring Rotation
Applying Trig Functions to Angles of Rotation
Trigonometric Functions of Any Angle
Relating Trigonometric Functions
Graphing Trigonometric Functions
Radian Measure
Applications of Radian Measure
Circular Functions of Real Numbers
Translating Sine and Cosine Functions
Amplitude, Period and Frequency
General Sinusoidal Graphs
Graphing Tangent, Cotangent, Secant, and Cosecant
Trigonometric Identities and Equations
Fundamental Identities
Proving Identities
Solving Trigonometric Equations
Sum and Difference Identities
Double Angle Identities
Half-Angle Identities
Products, Sums, Linear Combinations, and Applications
Inverse Trigonometric Functions
Basic Inverse Trigonometric Functions
Graphing Inverse Trigonometric Functions
Inverse Trigonometric Properties
Applications and Models
Triangles and Vectors
The Law of Cosines
Area of a Triangle
The Law of Sines
The Ambiguous Case
General Solutions of Triangles
Vectors
Component Vectors
The Polar System
Polar Coordinates
Graphing Basic Polar Equations
Converting Between Systems
More with Polar Curves
The Trigonometric Form of Complex Numbers
The Product and Quotient Theorems
De Moivre’s and the nth Root Theorems