2006-06-07 09:45:52 · 5 answers · asked by annie 2 in Science & Mathematics ➔ Mathematics
There is only 1, it's about .74 (radians).
You only have to consider x between -1 and 1, since the cosine is always between -1 and 1.
2006-06-07 09:55:37 · answer #1 · answered by kimmyisahotbabe 5 · 1⤊ 0⤋
Proof by graphing -- not bad!!
FOR BUDDING MATHEMATICIANS:
Consider: what if the solutions are in C (complex numbers)?
Don't try too hard -- yet!
But consider Euler's formula: e^x == cosx + isinx
Also try sinx == x and tanx == x.
2006-06-16 18:00:16 · answer #2 · answered by David Y 5 · 0⤊ 0⤋
I'm getting only one solution (Also using radians):
(0.73909, 0.73909)
2006-06-07 16:55:59 · answer #3 · answered by Baseball Fanatic 5 · 0⤊ 0⤋
Just one, x=0.73908513321516064166
:P
2006-06-16 07:47:38 · answer #4 · answered by Anonymous · 0⤊ 0⤋
a lot
2006-06-07 17:07:24 · answer #5 · answered by Jubei 7 · 0⤊ 0⤋