Right now

The most CLASSIC pick-up line I've heard!

If you're sin²x, then I'm cos²x
because
together, we make one.

OMGZ super ultimate right?!! It's sucha HOT pick-up line. HAHA. For those who haven't reached secondary three education(issit?) or those who've forgotten your trigonometric identities..

sin^{^2}(x) + cos^{^2}(x) = 1