Help with differentiation

[Floatzel98]

Our class started off with Differentiation this year (chapter 6 in essentials). From the start of the chapter i have been having trouble differentiating circular functions and knowing when to apply which differentiation rule to each question. In GMA last year i was away for most of circular functions and am still having a hard time learning how to use all the angle formulas and whatever else there is to solve the questions. And also last week we got up to points of inflexion which is chapter 6.5 and i'm having a difficult time getting my head around that as well.

I have asked my spesh teacher for help and even my methods teacher but i still haven't been able understand it. I have been on Khan Academy and watched the related videos and done those exercises but i still can't seem to do any textbook questions on my own, or i've only been able to partly do them. I was hoping for some other resources you guys could link me to or any explanations to help clarify these topics for me, especially the points of inflexion part.

Thanks

[keltingmeith]

You should try vTextbook.

[Floatzel98]

Thank you. I'll try it out now

EDIT: Wow, that's amazing. Thank you so much. It's perfect.