The first thing you should know in this case is that the equation is written in a rectangular form. It can be written in polar form. To do this, you must make the following change of variables: x = r * cos (theta) We have then: r * cos (theta) = 5 r = 5 / cos (theta) r = 5 * sec (theta) Answer: The polar form is: r = 5 * sec (theta) Note: the equation was already written in rectangular form.
The starting height of the tree was 1.85 meters. To find the number of meters the tree grew, you would subtract the current height from the previous height. 5.30-1.85=x. This equation is the same as 1.85 + x = 5.30 if you switch the 5.30 and x.
