Simplify and write the trigonometric expression in terms of sine and cosine:
sectcostsect=(f(t))2\displaystyle {\frac{{{\sec{{t}}}-{\cos{{t}}}}}{{{\sec{{t}}}}}}={\left({f{{\left({t}\right)}}}\right)}^{{2}}
f(t)=\displaystyle {f{{\left({t}\right)}}}=   .