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Proving the Cosine of a Difference Identity
Author:
Laura Kinnel
Topic:
Cosine
Move the step slider for a visualization to inspire a proof.
GeoGebra
New Resources
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Proving Triangles Congruent (2): One Step Transformations
Constructing an Isosceles Triangle with Given Side + Activities
Pendulum Snake
Constructing an Inscribed Equilateral Triangle + Activities
Discover Resources
Externally and internally rotation regular polygons relative
Explore Transformations
Adding positive and negative integers on a number line
Triangle Exterior Angle Theorem
Root-Mean-Squared Current
Graphing Inequalities on the Number Line
Discover Topics
Vectors 3D (Three-Dimensional)
Median Value
Angles
Integers
Reflection