In much the same way as you use rectangular coordinates.
With Cartesian or rectangular coordinates, you start from the origin and move a distance of x in the horizontal direction and then a distance of y in the vertical direction.
Using polar coordinates, you start from the origin along a ray inclined at an angle theta with the positive horizontal axis (clockwise from Eastwards), and you go a distance r along that ray.
In all but degenerate cases the Cartesian coordinates of (r, theta) are
x = r*cos(theta) and y = r*sin(theta)
while, conversely,
r = sqrt(x2 + y2) and theta = arctan(y/x).
You don't!
By substitution
Boats use them to navigate.
absolute relative and polar coordinates definition
You do not have to. You could use polar coordinates, if you prefer.
You don't!
By substitution
Boats use them to navigate.
In systems of equations, the graphing method is solving x and y by graphing out the two equations. x and y being the coordinates of the two line's intersection.
absolute relative and polar coordinates definition
You do not have to. You could use polar coordinates, if you prefer.
If the polar coordinates of a point P are (r,a) then the rectangular coordinates of P are x = rcos(a) and y = rsin(a).
The point whose Cartesian coordinates are (2, 0) has the polar coordinates R = 2, Θ = 0 .
It is important for beginners because the coordinates of the graphing points are measured from the origin. More expert users don't need to do so.
The point whose Cartesian coordinates are (-3, -3) has the polar coordinates R = 3 sqrt(2), Θ = -0.75pi.
Check: wikiHow Plot-Polar-Coordinates Made things a lot easier.....
(-4,0)