Tim_Lou Posted April 7, 2004 Report Share Posted April 7, 2004 cosx=x x in radians, to the nearest 100000th. this question made my myself (it just somewhat came up in my mind, i knew the answer though (found it by myself too)), it might be easy for you, or it might be hard.... Link to comment Share on other sites More sharing options...
Tim_Lou Posted April 8, 2004 Author Report Share Posted April 8, 2004 hmm, a little hint here, consider the graph y=x and y=cosx..... you have to use calculator..... Link to comment Share on other sites More sharing options...
Wannabe Genius Posted April 9, 2004 Report Share Posted April 9, 2004 if you're only interested to the nearest 100,000th then x = 0.739085. if you want it more precise, say to 10dp, then the value of x is 0.7390851332. No graphs used. only a calculator and a pen. Martin Link to comment Share on other sites More sharing options...
Tim_Lou Posted April 9, 2004 Author Report Share Posted April 9, 2004 haha, how you figure this out?? Link to comment Share on other sites More sharing options...
Tim_Lou Posted April 9, 2004 Author Report Share Posted April 9, 2004 hmm, give you another onetanx=xx in degrees for this one, and x doesnt equal zero, to the nearest 1000th (x between 1 to 90) another one, (this one is a bit harder)cosx=x^2x in radians, to the nearest 1000thhmm, if you know how this work, you can probably figure these 2 out.... (hint: using graph y=x^2 and y=cosx would help. but plz dont just trace the point, use your brain...and, calculator is needed...^^ ) Link to comment Share on other sites More sharing options...
Tim_Lou Posted April 10, 2004 Author Report Share Posted April 10, 2004 come on, are these too hard or too easy??? ??? here, the final one:e^x=x+2find all possible x, to the nearest 1000th.(hint: there are 2 answers, use the same method as other above. e is the natural number...) Link to comment Share on other sites More sharing options...
Tim_Lou Posted April 10, 2004 Author Report Share Posted April 10, 2004 well, i will tell you how to get cosx=x jsut pick a number, put it in your calculator. keep clicking cos.... when the number stop changing, here's your answer. simply saying, the answer = cos(cos(cos(cos(cos(cos(cos..............infinity cos..........(x)))))))))))))))....(x can be any number, but some numbers do not work.....just pick 1 as x if you want.....) Link to comment Share on other sites More sharing options...
Recommended Posts