Sunday

September 21, 2014

September 21, 2014

Posted by **Momo** on Wednesday, April 22, 2009 at 7:28pm.

I'm kind of new at parametrics, so this is what was given to me:

(x-h)^2 + (y-k)^2 = r^2

x^2 + y^2 = r^2

r = 10, y = rsint, x=rcost

So,

10cost + 10sint = 100

The answer is supposed to be

pi/2 < t < -pi/2

(actually greater than/less than or equal to)

My question is how do we get to the final solution, which is the pi/2 boundary. I know how to do the first part, I'm just not sure about the second...

Thank you!

**Answer this Question**

**Related Questions**

Calculus - Write a vector equation AND parametric equations of the line through ...

calculus - a circle of radius 1 rolls around the outside of a circle of radius 2...

calculus - a circle of radius 1 rolls around the outside of a circle of radius 2...

precalc - a circle is formed with a center (-3,5) and a radius.of 4 write the ...

calculus - A circle is formed with a center (-3, 5) and a radius 4 write a pair ...

Precalculus - The figure shows part of a curve traced by a point on the ...

calculus - (a) Modifying the parametric equations of a unit circle, find ...

Math - How do I write the Symmetric Equation of a line given the following ...

Math - How do I write the Symmetric Equation of a line given the following ...

physics 2 - A thin nonconducting rod is bent to form a semi-circle of radius R. ...