Google Classroom
GeoGebra
GeoGebra Classroom
Sign in
Search
Google Classroom
GeoGebra
GeoGebra Classroom
GeoGebra
Home
Resources
Profile
Classroom
App Downloads
Sine and Cosine of Sum of Angles
Author:
kosband
,
Tim Brzezinski
Topic:
Cosine
,
Sine
,
Trigonometric Functions
,
Trigonometry
GeoGebra
Here is a visual proof of the formulas for the sines and cosines of sums. It uses the properties of right triangles and rectangles.
New Resources
Ellipse, Hyperbola and Circle as Envelopes
Piano. Keyboard.
Rotating Points (Optical Illusion)
Slope of a Straight Line: Run and Rise
Simplifying Radicals: Geometric Thin Slice
Discover Resources
setvaluebug
Components of circle
Chapter 5 Sec 1-4 Quiz #5
Trapezium
พาราโบล่า
Discover Topics
Statistics
Matrices
Algebra
Functions
Congruence