SOLUTION: Please give the corresponding equations in rectangular coordinates? 1) r = π 2) θ = 6 3) r = 4/(3cosθ -sinθ ) 4) r^2 = 36/(9-13sin^2(θ) )

Algebra ->  Trigonometry-basics -> SOLUTION: Please give the corresponding equations in rectangular coordinates? 1) r = π 2) θ = 6 3) r = 4/(3cosθ -sinθ ) 4) r^2 = 36/(9-13sin^2(θ) )      Log On


   



Question 1044706: Please give the corresponding equations in rectangular coordinates?
1) r = π
2) θ = 6
3) r = 4/(3cosθ -sinθ )
4) r^2 = 36/(9-13sin^2(θ) )

Found 2 solutions by ikleyn, advanced_Learner:
Answer by ikleyn(52909) About Me  (Show Source):
You can put this solution on YOUR website!
.
Please give the corresponding equations in rectangular coordinates?
1) r = pi.      <---  sqrt%28x%5E2+%2B+y%5E2%29 = pi,  or  x%5E2+%2B+y%5E2 = pi%5E2.  It is the circle of the radius pi centered at (0,0).

2) theta = 6.      <--- y%2Fx = tan(6),  where tan(6) is the tangent of 6 radians (which is slightly less than 360 degs = 2pi = 6.28 . . . )
                           In addition, y < 0, x > 0, since the angle theta is in QIV (fourth quadrant).

                           So, it is the ray in the QIV.

3) r = 4/(3cosθ -sinθ )

4) r^2 = 36/(9-13sin^2(θ) )


Comment from student: Your answer in #2 is only partly correct. My calculus book says it is only y = (tan6)x.


My response: Thank you for your feedback.
My answer is fully correct.
Your calculus book is only partly correct.
The set of points theta = 6 is the ray starting at the origin of the coordinate system.
It is not a straight line.


Answer by advanced_Learner(501) About Me  (Show Source):