Drexel dragonThe Math ForumDonate to the Math Forum  Ask Dr.
Math  High School Archive   This page:   trigonometry checkmark
  Dr. Math  See also the Dr. Math FAQ:   trigonometry formulas
See also the Internet Library:   About Math     basic algebra
   linear algebra    linear equations  Complex Numbers  Discrete
Math  Fibonacci Sequence/   Golden Ratio       conic sections/
     coordinate plane    practical geometry  Negative Numbers
Number Theory  Square/Cube Roots   Browse High School
Trigonometry Stars indicate particularly interesting answers or
good places to begin browsing.  Selected answers to common
questions:     DeMoivre's theorem.     Volume of a tank.  Shadow
Moving Along a Wall [08/16/1999] There is a light at the front
of a circular arena. A boy starting from B runs at the rate of 3
m/s toward the center C. At what rate will his shadow be moving
along the rear wall when he is halfway from B to C?  The
Shortest Crease [12/29/1997]  Shot Out of a Cannon [10/12/1998]
A performer is shot out of