Related Clues:

• Trigonometric term
• ___ wave
• Go for fish
• Hidden motive
• Periodic function
• ___ mora (without delay, in Latin)
• Polygon corner
• Right triangle ratio
• Trig curve
• __ wave
• Drop a line from a pier, say
• This can be right
• It may be right
• Reciprocal of cosecant
• Seek slyly, with "for"