In this tutorial, we use Calculus to define the radian measure of an angle, and we carefully define sine (and cosine) of a radian angle.

We then prove some important limits involving sine and cosine, so that we can prove that the derivative of the sine function is simply the cosine function.

Finally, we look at the derivatives of the other standard trigonometric functions.

* Aimed at students in their final two years of high school.

* Studying mathematics is best done by working through examples and exercises. There are many interactive examples and exercises in this tutorial that must be completed to achieve 100% progress.

* Written by a Maths teacher with 20 years of teaching experience.

* Completely free (no Ads).

* Works without internet so that you can learn while travelling in the train, bus etc. Internet only required for links to privacy policy and other tutorials.

* Made with GameMaker (www.yoyogames.com)

* Only a 16 MB download.