Semi-Legend: “I liked LeoJEOSP’s rendition of the Princeton University football cheer: ‘Accost them, accost them, make them relinquish the ball.’ [BB. 11/7/2013] “It p… ...

Click in cell D2 to enter the secant function, which is not an Excel built-in function. Type "=" to begin entering a function into the cell, type "1/" to enter the inverse of a value and type "COS ...

For example, to simplify tan θ · csc θ, convert both functions: (sin θ/cos θ) · (1/sin θ) = 1/cos θ = sec θ. The sine terms cancel out, leaving a clean, simplified result.