/sci/ - Science & Math

>>5670971
I'm not sure that he asked for a way to solve that problem; I pretty much think he asked how to get from that kind of form he got to the one showed in answers. That formula wasnt a overkill. Is the simplest yet more general way of dealing with that kind of radicals. Nuff said.

And about solving that problem of his....yee that cosinus formula lead him to a nasty result; with a little bit of focus and use of geometry he could have solved it way easier without "memorizing" formulas although that cosinus formula is also easily derivable.