## Fun with Trigonometry |

Trigonometry
dates back to the ancient Greek astronomer/mathematicians and has been
studied for centuries by students all over the world. If like me your
experiences of the subject go back to the middle of the last century and
the finer points are still somewhat shrouded in mystery - take up this
nostalgic challenge and brush up with these basic exercises. f) Tan (A - B) = TanA
- TanB 1
+ TanA TanB |