Tim_Lou Posted April 7, 2004 Report 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....
Tim_Lou Posted April 8, 2004 Author Report Posted April 8, 2004 hmm, a little hint here, consider the graph y=x and y=cosx..... you have to use calculator.....
Wannabe Genius Posted April 9, 2004 Report 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
Tim_Lou Posted April 9, 2004 Author Report 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...^^ )
Tim_Lou Posted April 10, 2004 Author Report 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...)
Tim_Lou Posted April 10, 2004 Author Report 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.....)
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