Can anybody explain this?

Question

The problem is to change rectangular coordinates (0,7) to polar coordinates. the radius is obvioulsy 7 but theta=tan^-1(7/0). How can theta be undefined?

Equations
r= square root of (x^2 + y^2)
theta= tan^-1(y/x)

NOTE TO READER

ALL THESE IDIOTS DID NOT GRADUATE FROM HIGH SCHOOL AS THEY FAILED 11th GRADE!

Don't even waste my time with crap.

to those who do not wish to leave a stupid remark:

polar coordinates are coordinates on a radar type graph

defined as (r, theta)

r=radius
theta is the angle of measurement off of the X axis in Quadrant I in the euclidian coordinate graph.
| /
| / <===angle of theta
-----------|---)---------

theta is a symbol resembling a letter o except that it has a line through it. Sort of like a no smoking sign

Dynamica and Wise Guy covered it perfectly

Answer 1

By the rule of Pythagoras:

r= square root of (x^2 + y^2)

Tan q = y/x , so therefore:

q = tan-1( y/x )

So the rectangular point: (x,y) can be converted to polar coordinates like this:

(square root of (x^2 + y^2) , tan-1( y/x ) ) OR ( r , q )

umm. as for your question, since x=0 and y is positive, theta = pi/2 = 90 degrees

Answer 2

7/0 is undefined and tan(theta) is undefined, but that does not mean that theta is undefined.

In your head, picture the line from the origin (0,0) to the point (7,0). The angle that the line makes with the horizontal axis is 90 degrees. Hence, the angle theta is 90 degrees.

Answer 3

You see, when encountered with a situation like this the conventional tanx method is no longer applicable. There are 2 logical solutions to this. First, u can easily see t5hat the given pt is one on the Y-axis. So u directly know that the radius vector of the pt makes angle 90 degrees with the X-axis. otherwise, measure cotX= [x/y] where X will give u the angle made with the Y-axis. here that is zero, so naturally the angle with the X-axis is 90 degrees.

Answer 4

Let me check if Albert Einstein is available for you...Pls hold...

Answer 5

If in doubt, choose "C" as the answer.

Answer 6

let me know

Answer 7

cabrona!