Hey everyone, just wanted to let everyone know that Pinnacle has posted a couple of Crash Course videos on YouTube on Geometrical Application of Calculus (which includes curve sketching applications like finding stationary points and inflexion points, as well as the hard stuff like maximisation and minimisation problems). We are on a mission to help as many students as possible with their upcoming first HSC assessment at school. We only recently started the channel and we are hoping to continue to upload useful content for students doing the HSC Mathematics course in NSW. Please help spread the word so everyone can benefit 
Crash Course on Geometrical Application of Calculus - Curve Sketching
https://youtu.be/M04CmHi88N8
Crash Course - Caculus Maximisation and Minimisation Problems Part 1
https://youtu.be/I-DyQoQhW3Q
Geometrical Application of Calculus Max and Min Problems Part 2
https://youtu.be/cZYSLMdcz6s
Crash Course on Geometrical Application of Calculus - Curve Sketching
https://youtu.be/M04CmHi88N8
Crash Course - Caculus Maximisation and Minimisation Problems Part 1
https://youtu.be/I-DyQoQhW3Q
Geometrical Application of Calculus Max and Min Problems Part 2
https://youtu.be/cZYSLMdcz6s