Find the exact value of cos^ -1((cos(4pi/3))?

Find the exact value of cos^ -1((cos(4pi/3))

2007-09-05 02:38:52 · 2 answers · asked by austin 1 in Science & Mathematics ➔ Mathematics

cos(4pi / 3) = -0.5
cos^ -1 (-0.5) = 2pi/3

2007-09-05 02:45:30 · answer #1 · answered by Chameleon 2 · 2⤊ 0⤋

That's just 4pi/3. Cos^-1 and cos "undo" each other.

2007-09-05 10:12:46 · answer #2 · answered by steiner1745 7 · 0⤊ 1⤋

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