Why does [math]\displaystyle \lim_{x \to 0} \dfrac{\sin x}{x} = 1[/math]?
Does cos x = 0 always imply that sin x = 1?
מדוע [math]\displaystyle \lim_{x \to 0} \dfrac{\sin x}{x} = 1[/math]?
האם cos x = 0 תמיד מרמז שsin x = 1?