Having Trouble In Mathematica using Parametric Plot function. First timer

Questions
1

ParametricPlot[{cos[t], -sin[t]}, {t, 0,10 Pi}]

i know its basic but when I evaluate this, the graph comes up blank. Can someone tell me if I’m making a mistake somewhere? Thank You

2

Just capitalize the names of the functions:

ParametricPlot[{Cos[t], -Sin[t]}, {t, 0, 10 Pi}]

All built-in functions start with a capital letter.

3

Thank You! I knew it was something small like that.