sin(a + b) & cos(a + b) - Discovery

Topic:Angles, Triangles, Trigonometric Functions

Directions are given in the applet below.

Use your results to write 2 new trigonometric identities from what you now see. After doing so, go to the following applet: http://tube.geogebra.org/m/1651617

New Resources

Deriving the Sector Area Formula
Deriving the Arc Length Formula
繪畫垂直線
Isosceles Right Triangle
Segment Addition Postulate (Mild Questions)

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Багтаасан тойрог
cone
Inscribed angles
regular pentagon
Linear Transformations of a Triangle

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Cylinder
Intersection
LCM and GCD
Special Points
Similar Triangles