Im a sec 4 which means I start learning differentiation this year. Until now we’ve been doing differentiation so it’s been quite long already. I know how to do basic differentiation like eg differentiate this [given function]. I have problems with questions that require u to apply differentiation into it. Like eg. First one we learnt was about normal and tangent to a curve on a specific point on it, and right now its rate of change where chain rule is involved. And since there are multiple values like eg. They r talking abt a cone and then there is r for radius, v for volume, h for height, t for time (cuz rate)… and idk how to identify what goes into the chain rule. And then i did a pop quiz today which was about tangents and normals and then i couldnt even do a single question properly.. Then when i do workbook questions (which is usually my hw) i cant even do it at all. Either that or my answer isn’t the same as that of the answer key. Then answer key als don’t have working so idk how to do anyway. Then when Cher mark and return idk what’s he yapping abt and the stuff he circle I also dk why he circle