Question

Select the correct answer.Convert X = 4 to polar form.O A.r4sinoO B.cos4C.4cosO D.= 4O E.4T =sece

Answer 1

To convert a rectangular equation in polar form you use the next equations:

`\begin{gathered} x=r\cdot\cos \theta \\ y=r\cdot\sin \theta \end{gathered}`

As the given rectangular equation is x=4 use the first equation and substituthe the x by 4, then solve r:

`\begin{gathered} 4=r\cdot\cos \theta \\ r=(4)/(\cos \theta) \end{gathered}`

Then, the correct answer is the option C.