Question

I need help question

Answer 1

Given circle with 5.4 radian angle and radius 2.2 units long.

To find co-ordinate (x,y), we will use parametric form method,

and equation of circle is

`(x-a)^2+(y-b)^2=r^2`

To find x, y using radius and angle,

`\begin{gathered} x=a+r\cos \theta \\ y=b+r\sin \theta \end{gathered}`

So,

`\begin{gathered} x=2.2cos309^(\circ) \\ y=2.2\sin 309^(\circ) \end{gathered}`

Because 5.4 radian in degree equal approx. 309 degree.

Hence required co-ordinate is

`(x,y)=(2.2\cos 309^(\circ),2.2\sin 309^(\circ))`