Wednesday

October 22, 2014

October 22, 2014

Posted by **Abbey(Please help)** on Saturday, April 17, 2010 at 8:30pm.

(r,Q) = (4, 3pi/2)

I know that you are suppose to use

x=r cos Q and y=sin Q but I do not know how to plug this in.

- Math -
**Damon**, Saturday, April 17, 2010 at 8:48pm3 pi/2 is straight down the y axis

x = 4 cos (3pi/2)

but cos 3pi/2 is 0

so x = 0

sin 3pi/2 = -1

so y = -4

so (0,-4)

- Math -
**Reiny**, Saturday, April 17, 2010 at 8:51pmif (r,Q) = (4, 3pi/2)

then r = 4 and Q = 3π/3

now just substitute ...

x = 4cos 3π/2 and y = 4sin 3π/2

x = 0 and y = 4(-1) = -4

so the point is (0,-4)

**Answer this Question**

**Related Questions**

Math - plot the point given in polar coordinates and find the corresponding ...

trig - Given the polar coordinates of a point, how do I find the rectangular ...

Math - The rectangular coordinates of a point are given. Find two sets of polar ...

Pre-Calculus - Find the polar coordinates of each point with the given ...

Pre-Calculus - Find the rectangular coordinates of the point with the given ...

Pre-Calc - 2. The polar coordinates of a point are given. Find the rectangular ...

TRIGONOMETRY - 3. The rectangular coordinates of a point are given. Find the ...

calc - Find the corresponding rectangular coordinates for the polar point (4...

Calc 2 - Find the corresponding rectangular coordinates for the polar point (4...

pre calc.Math - Please help me any one of these please! Thank You to any one r=...