I was wondering if anyone would be kind enough to help me. It's question 10 I need help with.
I'm struggling with part a where dy/dx = 6cost (I know it's actually theta, but I will abbreviate to 't' for convenience).
When I differentiate x and y, I get:
dx/dt = -2sint
dy/dt = -6sin2t
and as dy/dx = (dy/dt)/(dx/dt), I get -6sin2t/-2sint, but I don't see how this makes 6cost. Could anyone point me in the right direction?
Core 4 Parametric Equations Watch
- Thread Starter
- 09-08-2016 16:42
- 09-08-2016 16:48
use double angle formula for sine.