Very Hard Maths Quiz

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Across
  1. 3. The value of sin(2π)
  2. 4. area of triangle cannot be
  3. 9. if the graphs of two lines are coinciding then the number of solutions are
  4. 10. The roots of x^2 + 1 = 0 are
  5. 12. These numbers are of the form a + ib
  6. 14. the sum of coordinates of points on the circumference of circle of radius 4
Down
  1. 1. Used in architecture
  2. 2. a(r^n - 1)/(r - 1) is the formula of
  3. 5. Who gave the lemma a = bq + r
  4. 6. The SI unit of measuring angles
  5. 7. The measure of π/2 radians in degrees
  6. 8. Mathematical Concept used to find area under a curve
  7. 11. (sinθ)^2+(cosθ)^2
  8. 13. The reference angle used in triangles