Math puzzle

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Across
  1. 2. The x axis is also known as?
  2. 4. Linear equation having 1 unique solution
  3. 7. When we divide sin/cos
  4. 9. numbers All numbers that can be found on a number line.
  5. 13. the angle from the horizontal upward to an object
  6. 14. Reciprocal of sine is
  7. 16. A polynomial with 2 terms
Down
  1. 1. A type of triangle having two sides equal
  2. 3. A triangle with all angles 60 degrees
  3. 5. roots A quadratic equation has atleast___ roots
  4. 6. In an AP:d=-4,n=7,an=4,a=?
  5. 8. A number that cannot be expressed as a fraction with co- prime integers
  6. 10. of symmetry A vertical line that divides a parabola into 2 equal halves
  7. 11. How many parts is the cartesian plane divide into?
  8. 12. A constant polynomial has degree?
  9. 15. 3x+2y=6 & 6x+4y=12 are called_____lines
  10. 17. If the length of the shadow of a tree is decreasing then the angle of elevation is