Find sec^-1 (-2)?

1 ⤊

2007-05-20 17:27:48 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

3 answers

x=120 degrees or x=240 degrees

2007-05-20 17:34:02 · answer #1 · answered by bruinfan 7 · 1⤊ 0⤋

No solution. Inverse secant can only be evaluated between -1 and 1. Same applies to inverse sine, cosine and cosecant. Only inverse tangent and cotangent can be evaluated for number greater than 1 or less than -1

2007-05-21 00:40:07 · answer #2 · answered by tntigers99 1 · 0⤊ 0⤋

arcsec(-2) = arccos(-1/2) = 120Â°

2007-05-21 00:33:02 · answer #3 · answered by Northstar 7 · 0⤊ 0⤋