11/7/2013] “It put me in mind of MIT’s cheer: ‘E to the U du dx, / E to the X dx. / Cosine, secant, tangent, sine, 3.14159. / Integral radical mu dv / Slipstick, sliderule, MIT.

Given a function f(x), and two points on the curve (a, f(a)) and (b, f(b)) the line joining these two points is called a secant line of f. (Not to be confused with the trigonometric secant (sec) ...

Use a mathematical reference to look up the formula for the secant function, which is the inverse of the cosine of an angle (see link in Resources). Click in cell D2 to enter the secant function ...