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sin (a+b)=sina cosb + cosa sinb
Author:
Bruce Hampton
GeoGebra
New Resources
"Compressed" Astroid as Envelope
Parallel or Not? (V2)
Viviani's Window
Ellipse as Envelope - Correspondence Method
History of Maths
Discover Resources
perpendicular bisector circumcenter
Final Project
Midsegment of a Trapezoid
Enlargements
Plane & Sphere Intersections
Discover Topics
Angles
Rhombus
Incircle or Inscribed Circle
LCM and GCD
Pythagoras or Pythagorean Theorem