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

Squaring a Rectangle (PST Version)
Right Triangle Inscribed in a Semicircle
Midpoint Theorem (V2): Integer Solutions
Deriving the Sector Area Formula
Angle Addition Postulate (V2) - Integer Solutions

Discover Resources

Geometry of a soccer ball / football
Cairo Pentagonal Tessellation
problem 5
tre sirkler
Trig Circle: Coordinates of Special Angle Values

Discover Topics

Optimization Problems
Calculus
Sequences and Series
Conditional Probability
Upper and Lower Sum or Riemann Sum