Trig, for calc, e.g

• Trig, vis-à-vis calc
• Trig vis-à-vis calc, usually
• Intro to Comp Sci, for Data Structures, e.g.
• Algebra, for calc, e.g
• Trig, for calc, often
• Trig for calc, often

Wiktionary Word definitions in Wiktionary
n. (context informal English) prerequisite