- #1

Mr X

- 24

- 3

- Homework Statement
- Proof of sin(x) without using any other trig derivatives unproved.

I'm trying to derive the derivatives of trigonometric equations, while I can solve others using sine's derivative, I can't derive the derivative of sin x itself.

- Relevant Equations
- First principle, basic algebra and basic trig

How do I do this from here without using the derivatives of sin or cos ?