saadsaad
May 29, 2011, 11:18 PM
{tan (pi / 2 - x ) sec x } / 1-csc^2 x
ebaines
May 31, 2011, 06:51 AM
saadsaad - if your question is how to simplify this, try replacing the tan, sec, and csc functions with their sine and cosine primitives. And recall that sin(pi/2-x) = cos(x), and cos(pi/2 - x) = sin(x).