Related Clues:

• --- "qua non"
• Trigonometry wave
• Cosecant reciprocal
• Angle function
• Trigonometry curve
• 0, for 180 degrees
• Calculator function
• Trig calculation
• Wave that can't be ridden
• Trigonometry figure
• 23 Across function
• Without: Lat.
• Scientific calculator function
• Tangent's cousin
• ''__ nomine'' (nameless: Lat.)