od Daniel » Petak, 27. Jun 2014, 18:08
[inlmath]\cos^2x[/inlmath] izrazi preko kosinusa dvostrukog ugla, primenivši formulu [inlmath]\cos^2x=\frac{1+\cos 2x}{2}[/inlmath]. Zatim rešavaj jednačinu po [inlmath]2x[/inlmath]. Dalje je lako.
I do not fear death. I had been dead for billions and billions of years before I was born, and had not suffered the slightest inconvenience from it. – Mark Twain