Write a rectangular equation in polar form

The video tutorial explains how to convert an equation into the form of R cosine Theta or R sine Theta. It discusses the use of secant for conversion, highlighting that dividing by secant is equivalent to multiplying by cosine. The tutorial also covers reciprocal relationships, such as dividing by two being the same as multiplying by 1/2. Finally, it concludes with the equation in rectangular form.

What is the significance of cosine in the equation discussed?

What does the term 'rectangular form' refer to in the context of this discussion?