# Category:Trigonometry

This category contains pages that are part of the Trigonometry book.

## Related categories

The following related category may be of interest.

### T

The following 142 pages are in this category, out of 142 total.

### A

- Trigonometry/A Brief History of Trigonometry
- Trigonometry/A Square Wave in Sines
- Trigonometry/Addition and Subtraction Theorems
- Trigonometry/Addition Formula for Cosines
- Trigonometry/Addition Formula for Sines
- Trigonometry/Angles of a triangle sum to 180 Degrees
- Trigonometry/Angles of Elevation and Depression
- Trigonometry/Applications and Models
- Trigonometry/Area of a quadrilateral
- Trigonometry/Areas of Triangles

### C

- Trigonometry/Calculating Pi
- Trigonometry/Circles and Triangles/Area bisectors
- Trigonometry/Circles and Triangles/Brocard's Theorem
- Trigonometry/Circles and Triangles/Ceva's Theorem
- Trigonometry/Circles and Triangles/Menelaus' theorem
- Trigonometry/Circles and Triangles/Morley's Triangle
- Trigonometry/Circles and Triangles/Napoleon's theorem
- Trigonometry/Circles and Triangles/Orthocentric points
- Trigonometry/Circles and Triangles/Other Centers of a Triangle
- Trigonometry/Circles and Triangles/Other Centres of a Triangle
- Trigonometry/Circles and Triangles/Philo's Line
- Trigonometry/Circles and Triangles/The Circumcircle
- Trigonometry/Circles and Triangles/The Excentral Triangle
- Trigonometry/Circles and Triangles/The Excircles
- Trigonometry/Circles and Triangles/The Fermat Point
- Trigonometry/Circles and Triangles/The Incircle
- Trigonometry/Circles and Triangles/The Miquel Point
- Trigonometry/Circles and Triangles/The Nine-point Circle
- Trigonometry/Circles and Triangles/The Pedal Triangle
- Trigonometry/Circles and Triangles/The Pivot theorem
- Trigonometry/Circles and Triangles/The Seven circles theorem
- Trigonometry/Circles and Triangles/The Simson line
- Trigonometry/Circles and Triangles/Thebault's theorem
- Trigonometry/Circles and Triangles/Viviani's theorem
- Trigonometry/Collection of Problems
- Trigonometry/Collection of Problems/Line Values and Graphs of Trigonometric Functions
- Trigonometry/Collection of Problems/Trigonometric Functions of Angles
- Trigonometry/Collection of Problems/Vectors
- Trigonometry/Compass Bearings
- Trigonometry/Concepts
- Trigonometry/Conventions
- Trigonometry/Converting One Triangle into Another
- Trigonometry/Cosecant, Secant, Cotangent
- Trigonometry/Cosh, Sinh and Tanh
- Trigonometry/Cosine and Sine
- Trigonometry/Cyclic Quadrilaterals and Ptolemy's Theorem

### D

### E

### F

- Trigonometry/For Enthusiasts/A Generalization of Pythagoras' Theorem
- Trigonometry/For Enthusiasts/Chebyshev Polynomials
- Trigonometry/For Enthusiasts/Degrees Minutes and Seconds
- Trigonometry/For Enthusiasts/Delaunay triangulation
- Trigonometry/For Enthusiasts/Doing without Sine
- Trigonometry/For Enthusiasts/Erdős–Mordell inequality
- Trigonometry/For Enthusiasts/Hilbert's third Problem
- Trigonometry/For Enthusiasts/Introductions
- Trigonometry/For Enthusiasts/Less-Used Trig Identities
- Trigonometry/For Enthusiasts/Lissajous Figures
- Trigonometry/For Enthusiasts/Pythagorean Triples
- Trigonometry/For Enthusiasts/Regular Polygons
- Trigonometry/For Enthusiasts/The CORDIC Algorithm
- Trigonometry/For Enthusiasts/The Distance from New York to Tokyo
- Trigonometry/For Enthusiasts/Transformation of products into sums
- Trigonometry/For Enthusiasts/Triangles on a Sphere
- Trigonometry/For Enthusiasts/Trigonometry Done Rigorously
- Trigonometry/For Enthusiasts/What Tessellations are Possible with Regular Polygons
- Trigonometry/Functions of complex variables

### G

### P

- Trigonometry/Phase and Frequency
- Trigonometry/Plotting (Cos t, Sin t)
- Trigonometry/Power Series for Cosine and Sine
- Trigonometry/Power Series for e to the x
- Trigonometry/Prerequisites and Basics
- Trigonometry/Price's Theorem
- Trigonometry/Print version
- Trigonometry/Proof: Angles sum to 180
- Trigonometry/Proof: Heron's Formula
- Trigonometry/Proof: Pythagorean Theorem

### R

### S

- Trigonometry/Selected Angles Reference
- Trigonometry/Similar,Congruent,Isosceles, and Equilateral
- Trigonometry/Simplifying a sin(x) + b cos(x)
- Trigonometry/Sine Squared plus Cosine Squared
- Trigonometry/Soh-Cah-Toa
- Trigonometry/Solving triangles by half-angle formulae
- Trigonometry/Solving Triangles Given ASA
- Trigonometry/Solving Triangles Given SAS
- Trigonometry/Solving Trigonometric Equations
- Trigonometry/Some Little-known Trigonometric Functions
- Trigonometry/Some preliminary results
- Trigonometry/Some theorems using vectors
- Trigonometry/Sum into Product

### T

- Trigonometry/Teachers Notes/About This Book
- Trigonometry/Teachers Notes/Khan Academy Videos
- Trigonometry/Thales Theorem
- Trigonometry/The distance and dip of the horizon
- Trigonometry/The Eyeball Theorem
- Trigonometry/The Gibbs Overshoot
- Trigonometry/The most Difficult Triangles to Solve
- Trigonometry/The Pythagorean Theorem
- Trigonometry/The sine of 15 degrees
- Trigonometry/The sine of 18 degrees
- Trigonometry/The solution of cubic equations
- Trigonometry/The summation of finite series
- Trigonometry/The Unit Circle
- Trigonometry/Trigonometric Form of the Complex Number
- Trigonometry/Trigonometric Formula Reference
- Trigonometry/Trigonometric identities
- Trigonometry/Trigonometric Identities for Triangles
- Trigonometry/Trigonometric Unit Circle and Graph Reference