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Across 4. The inverse of the sine function. 6. Polar graph with "leaves". 8. Number in the form "a + bi". 9. The set of output values for a function. 11. The ratio of the opposite leg to the adjacent leg. 13. Graph of y = mx + b. 14. A six-sided polygon. 16. Graph of y = x^2. 17. Longest side in a right triangle. 19. Line which is appoached by a graph. 21. Instrument for measuring angles in degrees. 24. Two angles whose sum is 180 degrees. 27. The reciprocal of the period. 29. Sign of an angle with counter-clockwise rotation. 31. The reciprocal of the tangent. 32. Terminal sides coincide. 35. Graph of x^2 + y^2 = r^2. 36. 1/60th of a minute. 37. A non-right triangle. 38. The set of possible input values for a function. 39. The ratio of the opposite leg to the hypotenuse.

Down 1. Name for the origin in polar graphing. 2. 1/60th of a degree. 3. The ratio of the adjacent leg to the hypotenuse. 4. Intercepted by a central angle in a circle. 5. Two angles whose sum is 90 degrees. 7. A radial angle. 10. Angle from horizontal down to line of sight. 12. The reciprocal of the sine. 15. (pi)/2 radians in degrees. 18. Secant is the __?__ of the cosecant. 20. Angle from horizontal up to line of sight. 22. 1/360th revolution. 23. An equation that is true for all values in the domain. 25. Half the difference between maximum and minimum. 26. Instrument for drawing circles. 28. Sign of an angle with clockwise rotation. 30. The change in y over the change in x. 32. A heart-shaped curve. 33. The reciprocal of the cosine. 34. One cycle of a trigonometric function.