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.

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 ...