Math question
2007-01-17 08:46:57 · 6 answers · asked by Trinity 1 in Science & Mathematics ➔ Mathematics
x=-1 is the only one... i think...
2007-01-17 08:50:30 · answer #1 · answered by LazyDaisy 3 · 0⤊ 2⤋
the cosine function is a periodic function, meaning that it returns to a given value based on its frequency. Because of this, there are infinite solutions to the equation cos x = -1. The primary solution is X = +/- pi, but you can expand it to include all solutions by multiplying pi by any odd integer multiple.
cos x = -1
x = +/- n*pi, where n is an odd integer.
2007-01-17 16:57:38 · answer #2 · answered by Bigfoot 7 · 0⤊ 0⤋
get a scientific calculator... hit the "2nd" button then hit "cos"... then type 1 BINGO.. i learned this last year but i think thats how to do it, becuase u multiply each side by -1 first. Or most math books have a chart at the end of the book... try looking for that.. one of those ii ix pages or w/e.
2007-01-17 16:52:53 · answer #3 · answered by Corey 4 · 0⤊ 0⤋
x = n*(pi)
where n is an odd number: +- 1, 3, 5...
2007-01-17 16:51:07 · answer #4 · answered by Anonymous · 2⤊ 0⤋
cosx= -1
x = (2n+1)pi (n belongs to all intergers)
2007-01-17 17:09:20 · answer #5 · answered by Finoai 2 · 0⤊ 0⤋
x=180 ??
2007-01-17 16:54:46 · answer #6 · answered by VanessaM 3 · 0⤊ 1⤋