If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Skip to main content
Subjects
  • Math by subject
    • Early math
    • Arithmetic
    • Pre-algebra
    • Algebra 1
    • Geometry
    • Algebra 2
    • Trigonometry
    • Precalculus
    • Statistics & probability
    • AP Calculus AB
    • AP Calculus BC
    • Multivariable calculus
    • Differential equations
    • Linear algebra
  • Math by grade
    • Kindergarten
    • 1st
    • 2nd
    • 3rd
    • 4th
    • 5th
    • 6th
    • 7th
    • 8th
    • Eureka Math/EngageNY
    • High school
  • Science & engineering
    • Physics
    • AP Physics 1
    • AP Physics 2
    • Cosmology & astronomy
    • Chemistry
    • AP Chemistry
    • Organic chemistry
    • Biology
    • AP Biology
    • Health & medicine
    • Electrical engineering
  • Computing
    • Computer programming
    • Computer science
    • Hour of Code
    • Computer animation
  • Arts & humanities
    • World history
    • US history
    • AP US History
    • Art history
    • Grammar
  • Economics & finance
    • Microeconomics
    • Macroeconomics
    • Finance & capital markets
  • Test prep
    • SAT
    • MCAT
    • GMAT
    • IIT JEE
    • NCLEX-RN
  • College, careers, & more
    • College admissions
    • Careers
    • Personal finance
    • Entrepreneurship
Search
DonateSign in / Sign up
Search for subjects, skills, and videos
Main content
Trigonometry

Trigonometry with general triangles

Overview

Practice
Contents
About
The law of sines
The law of cosines
Solving general triangles
Learn how to use trigonometry in order to find missing sides and angles in any triangle.
Practice for your next test
3 exercises available

The law of sines

Learn about the Law of sines and how to use it in order to find missing side lengths and angles in general triangles.
Solving for a side with the law of sines
Solving for an angle with the law of sines
Solve triangles using the law of sines
Practice
Proof of the law of sines

The law of cosines

Learn about the Law of cosines and how to use it in order to find missing side lengths and angles in general triangles.
Solving for a side with the law of cosines
Solving for an angle with the law of cosines
Solve triangles using the law of cosines
Practice
Proof of the law of cosines

Solving general triangles

Use the power of trigonometry in order to solve various problems that involve triangles.
Trig word problem: stars
General triangle word problems
Practice
Laws of sines and cosines review
Trigonometry with right triangles
The unit circle definition of sine, cosine, and tangent
Up Next
The unit circle definition of sine, cosine, and tangent