1. Segitiga Siku-siku
Video Konsep Dasar
Transkrip Konsep Dasar
\(\sin \alpha = \dfrac yr = \dfrac {\text{depan}}{\text{miring}}\)
\(\cos \alpha = \dfrac xr = \dfrac {\text{samping}}{\text{miring}}\)
\(\tan \alpha = \dfrac yx = \dfrac {\text{depan}}{\text{samping}}\)
\(\sec \alpha = \dfrac {1}{\cos \alpha} \)
\(\csc \alpha = \dfrac {1}{\sin \alpha} \)
\(\cot \alpha = \dfrac {1}{\tan \alpha} \)
2. Sudut Istimewa
| \(0\) | \(30^{\text{o}}\) | \(45^{\text{o}}\) | \(60^{\text{o}}\) | \(90^{\text{o}}\) | \(37^{\text{o}}\) | \(53^{\text{o}}\) | |
| Sin | 0 | \(\dfrac{1}{2}\) | \(\dfrac{1}{2}\sqrt{2}\) | \(\dfrac{1}{2}\sqrt{3}\) | 1 | \(0,6\) | \(0,8\) |
| Cos | 1 | \(\dfrac{1}{2}\sqrt{3}\) | \(\dfrac{1}{2}\sqrt{2}\) | \(\dfrac{1}{2}\) | 0 | \(0,8\) | \(0,6\) |
| Tan | 0 | \(\dfrac{1}{3} \sqrt{3}\) | 1 | \(\sqrt{3}\) | ∼ | \(\dfrac 34\) | \(\dfrac 43\) |