[ATTACH=full]3528[/ATTACH]..................use identity sec^2(t)=1/cos^2(t)
=[ATTACH=full]3529[/ATTACH]
=[ATTACH=full]3530[/ATTACH]
=[ATTACH=full]3531[/ATTACH]
=[ATTACH=full]3532[/ATTACH]..................simplify, cancel cos^2(t)
=sin^2(t)
domain:
R (all real numbers)
range:
{y element R : 0<=y<=1}
