Bob: How to get rid of erroneous functions viz. sin, cos and tan?
Arron: Try Bibhorr Formula!!
By Lucille
Quadratic Formula
The best method of solving a quadratic. When your equation is in the standard form of ax² + bx + c = 0, x = (-b ± √b² - 4ac) / 2a. It is far superior to both factoring and completing the square. The equation may look difficult, but all you have to do is plug in the coefficients and simplify!