What is $ \lim_{x\rightarrow0} \frac{\sin x}{x}$ ? Recall the definition of a limit, repeated here for reference […]
Category: Trigonometry
Christina DanielThe Radian
A radian is defined as follows. $360^{\circ} = 2 \pi$ radians. Dividing both sides by […]
De Moivre’s Theorem
This is a proof of de Moivre’s Theorem. This was originally presented by reference [1]. […]
Angle Addition Identities
This post includes proofs of two angle addition identities. $ \sin(x+y) = \sin x \cos […]