An equation whose variables are polar coordinates is called a

An equation whose variables are polar coordinates is called a polar equation. These equation are characterized by an r as a function an angle. Polar equations can be written in rectangular coordinates by certain relationships. An example of a polar equation would be r = 2sin∅.

Answer with explanation:

Polar Equation : An equation whose variables are polar coordinates.

         Polar equation of a curve is denoted in terms of (r, theta).

  Where,

               

x and y are abscissa and ordinate in x y plane.

Theta is angle made by line joining origin to point represented by , P(r, Theta) in Positive direction of X axis.

⇒r=Distance from origin to the point

Polar equation of Circle

⇒x²+y²=r²

x=r cos A

y=r sin A

Angle , A is made with positive direction of X axis from line joining origin to end point.

Answer

312-170=142

142÷2=71

170+71=241

241+71=312

train A weighs 241 tons

Step-by-step explanation: