Practise solving trigonometric equations in degrees or radians using CAST and its period to find other solutions within the range, including multiple or compound angles and the wave function.

Holy trinity of software. beware! Move over spreadsheet data base handler and word processor. Make room for the equation solver, the simulation/prediction program for those who live by the numbers.

This jingle has helped generations of algebra students recall the quadratic formula that solves every equation of the form $latex ax^2+bx+c=0$. The formula is as ...