Does anyone know the cos-1(-radical3)?

2007-11-04 14:15:09 · 2 answers · asked by lovelylittlelady 3 in Science & Mathematics ➔ Mathematics

cos-1(-(radical3)/2) is 150 and 210 degrees.

2007-11-04 14:21:31 · answer #1 · answered by John B 6 · 0⤊ 0⤋

Arc cos cannot be greater than 1 and rad3 is 1.7
are you sure it is not -1/rad3 ?

then it is 150 and 210

2007-11-04 22:20:09 · answer #2 · answered by norman 7 · 0⤊ 0⤋

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