Related Clues:

• Calc prerequisite
• Certain math
• Navigator's study
• "What's your sine?" subj.
• Subject with many unknowns
• High-school math subj.
• Math subj. with many functions
• One of the Palins
• Course with x's
• High-school course
• High-school math course
• Course with sines and tangents (Abbr.)
• Pre-calc subject
• Palin boy
• It often involves x's