Related Clues:

• H.S. math
• ___ qua non
• H.S. subject
• Math class, informally
• Math subject
• Kind of curve, in math
• Trig function
• Trig ratio
• Kind of curve
• H.S. course
• Kind of wave
• Ratio of AB to BC, say
• Fourier series function
• Math ratio
• Trig. ratio