8.2 Using Trigonometric Identities (PURE 2 - Chapter 8: Parametric equations)

[@toxicphase7223]

For example 4 can’t you divide the range so -pie/2 by 2 so the new range is -pie/4 all the way to pie/4. And then draw the new graph but wouldn’t it be different to the one in the video. I’m not sure where I’ve gone wrong.

[@HindsMaths]

No, that would be incorrect. Once you've found the Cartesian equation then use the values of "t" to work out max/min values of "x" (domain) and "y" (range). Sketching graphs may help here

[@toxicphase7223]

Ohhhh so the domain is the x axis -pie/2 all the way to pie/2. Because isn’t the domain the Max and min x value can take which is in the x axis

[@HindsMaths]

That's right, you've got it!!

[@toxicphase7223]

Thank you for the help.

[@HindsMaths]

You're welcome