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

Right Triangle Inscribed in a Semicircle
繪畫垂直線
What Do You See? (2)
Linear Equation Graphs: Thin Slice
Perpendicular Lines: Quick Exploration

Discover Resources

Writing Equations to Represent Data in Tables 104
Mokamorphoses
Hipo/Epeicycloids
MaggieBerkley_RightIsoscelesTriangle
Alternate angles 2

Discover Topics

Quadrilaterals
Secant Line or Secant
Geometry
Matrices
Cosine