 
PART 2：常用的特別角
| |
\(\sin \theta \) |
\(\cos \theta \) |
\(\tan \theta \) |
| \(\theta = {30^ \circ }\) |
\(\frac{1}{2}\) |
\(\frac{{\sqrt 3 }}{2}\) |
\(\frac{1}{{\sqrt 3 }}\) |
| \(\theta = {45^ \circ }\) |
\(\frac{{\sqrt 2 }}{2}\) |
\(\frac{{\sqrt 2 }}{2}\) |
\(1\) |
| \(\theta = {60^ \circ }\) |
\(\frac{{\sqrt 3 }}{2}\) |
\(\frac{1}{2}\) |
\(\sqrt 3 \) |
以上特別角是基本三角函數值，應該要熟記 |
|