Make a 3,4,5 Triangle ... Connect three lines ... And you will have a right angle (90) ... You can use other lengths by multiplying each side by 2. Or by 10. Or any multiple.| www.mathsisfun.com
この記事では、数学を苦手とする人間の視点から、CSS に導入された `sin()`、`cos()`、`tan()` を試しながら三角関数の基礎を学習していきます。| griponminds.jp
Sine, Cosine and Tangent are the main functions used in Trigonometry and are based on a Right-Angled Triangle. Before getting stuck into the...| Math is Fun