This circle has the centre at the origin and a radius of 1 unit. The point P can move around the circumference of the circle. At point P the \(x\)-coordinate is \(\cos{\theta}\) and the \(y ...

Let’s look at how to use trigonometric identities to calculate missing sides. \({sin~θ} = \frac {opposite} {hypotenuse}\) \({cos~θ} = \frac {adjacent} {hypotenuse ...

eine unendliche Reihe der Form \begin{eqnarray}\frac{{a}_{0}}{2}+\displaystyle \sum _{k=1}^{\infty}({a}_{k}\cos kx+{b}_{k}\sin kx),\ \ \ \ x\in {\mathbb{R}},\end ...