1. - ANSWER-P(5/3 , 4)
2. - ANSWER-P(17/2 , 23)
3. - ANSWER-x-2y-5
4. - ANSWER-(x-2)^2+(y+1)^2=25
5. - ANSWER-Center: (1,2) , Radius: √5
6. - ANSWER-Boundries are included.
7. - ANSWER-cosA=5/13 , tanA = 12/5
8. - ANSWER-cosθ=-√3/3 , sinθ= √6/3
12. - ANSWER-16/65
13. - ANSWER--√6/6
14. - ANSWER-2/3π < θ < 4/3π
15. - ANSWER-θ= 11/12π, 17/12π