co·func·tion 
(kōfŭngk′shən)
(kōfŭngk′shən)n.
The trigonometric function of the complement of an angle: The tangent is the cofunction of the cotangent.
- take a leak
- take a load off
- take an oath
- take apart
- take a powder
- take a shine to
- take at (someone's) word
- take at someone's word
- take at word
- takeaway
- take away from
- take a wee
- take a whack at
- take a whiz
- take back
- take breath away
- take by storm
- take/call/bring to task
- take care
- take care of
- take charge
- take-charge
- take cover
- take down
- takedown