Which could be more useful for calculus (Both aren't really that related but I think they are the last 2 )
-Probability & combinatorics/permutations
-Circles (Geometry) inscribed angles, tangent lines , arc length,measure etc..
Probability and combinatorics won't really help you at all in calculus. It just doesn't come up.
Geometry doesn't really come up that much either though it will help with word problems.
You need a solid grounding in trig, that's about it.