How to learn trigonometric formulas in no time

Part-2  link  https://youtu.be/FUTjSMbXHkI
You tube link part 1-  https://youtu.be/NfRDM1Zpxhk
Blogspot link -http://successgraph.blogspot.co.ke/2017/05/how-to-learn-trigonometric-formulas-in.html?m=1
Fb official page link-https://www.facebook.com/successgrapheducationpoint/
Instagram link- https://www.instagram.com/p/BTyokClBUtn/?r=wa1