What is [math]\displaystyle \lim_{x \to 0} \frac{1-\cos x }{x^2} [/math]?
[math]\displaystyle \lim_{x \to 0} \left(\frac{1}{x^2}-\frac{1}{\tan^2 x}\right) =[/math] ?
מה זה [math]\displaystyle \lim_{x \to 0} \frac{1-\cos x }{x^2} [/math]?
[מתמטיקה]\displaystyle \lim_{x \to 0} \left(\frac{1}{x^2}-\frac{1}{\tan^2 x}\right) =[/math] ?