Search
Google ClassroomGoogle Classroom
GeoGebraGeoGebra Classroom
GeoGebra
  • Home
  • Resources
  • Profile
  • Classroom
  • App Downloads

Double Angle Trig Identity: Proof via Equal Areas

Author:Tim Brzezinski
Topic:Area, Cosine, Geometry, Sine, Trigonometric Functions, Trigonometry

New Resources

  • z`]]
  • အခြေခံ data အခေါ်အဝေါ်များ
  • Triangle with 3 Right Angles
  • seo tool
  • Shells

Discover Resources

  • Distance #1
  • incenter
  • Power of a point
  • Trekant og Rektangel
  • Angle between a line and a plane

Discover Topics

  • Quadrilaterals
  • Binomial Distribution
  • Fractal Geometry
  • Distributions
  • Similar Triangles
AboutPartnersHelp Center
Terms of ServicePrivacyLicense
Graphing CalculatorCalculator SuiteMath Resources

Download our apps here:

Download_on_the_App_Store_Badge_US-UK_RGB_blk_4SVG_092917

© 2026 GeoGebra®