Pre-cal help please?

how do i solve this?
cos^-1 [cos(-pi divided by 3)]

2007-10-10 13:07:38 · 2 answers · asked by Lucy B 4 in Science & Mathematics ➔ Mathematics

If I remember correctly the cos^-1 and cos cancel out so it is just -pi divided by three.

2007-10-10 13:16:19 · answer #1 · answered by Aron 2 · 0⤊ 0⤋

cos(-pi/3) = .5
arccos(.5) = 1.047197551 = pi/3

2007-10-10 13:17:26 · answer #2 · answered by ironduke8159 7 · 0⤊ 0⤋

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