python - Certain trigonometry packages from numpy -

i'm writing code solves intersection of few functions involve cos , sin , other various trig functions in python.

but feel importing numpy whole of load on such small program, there other way basic trig functions , pi, without importing whole or specifying

from numpy import cos numpy import sin ... 

the easiest , economical way this?

sin, cos, , pi in math module. just:

from math import sin, cos, pi 

no numpy required.

if you're using sin , cos on numpy arrays, it's better use numpy version, otherwise, ones math module good.