Mathematicians once turned up their noses at imaginary numbers. But complex analysis actually simplifies math and physics.

An understanding of the three trigonometric ratios and how to change the subject of a formula is essential. The Greek letter, Ɵ (theta) is often used as a symbol for an unknown angle. For a right ...

Mathematicians had long thought that using trigonometry to prove the theorem was unworkable, given that the fundamental ...