Related Clues:

• Protractor measurement
• Latin preposition
• It may be acute
• Sine's reciprocal, briefly
• Ratio involving a hypotenuse
• Trigonometric term
• ___ wave
• Go for fish
• Hidden motive
• Periodic function
• ___ mora (without delay, in Latin)
• Polygon corner
• Right triangle ratio
• Trig curve
• __ wave