# EXTRA: In-depth

History of trigonometry

Click on the link below if you want to do challenge yourself. All the work you will put in now, saves work for the upcoming years. Also you will see that solving some of these problems are just like solving a puzzle. It can be a lot of fun as well!

Trigonometry and what else to expect
Khan academy provides courses for mathematicians who are in need of help or want to expand their knowledge of math. All these subjects will also come back in next years when you choose Maths B