# Thread: Solving simultaneous equations with sin in

Thanks

2. ## Re: Solving simultaneous equations with sin in

Originally Posted by user654321
I have the following question

r = 3 - 4sin (theta) and r = 1 + 6 sin (theta)

How do i solve this to find the points on intersection.

Thanks
\displaystyle \begin{align*} r &= 3 - 4\sin{\theta} \\ r &= 1 + 6\sin{\theta} \\ 1 + 6\sin{\theta} &= 3 - 4\sin{\theta} \end{align*}

You should be able to solve for \displaystyle \begin{align*} \theta \end{align*} at least...