I'm pretty sure the answer is supposed to be pi/3, but I just wanted to confirm this. What is arccos(1/2) equal to in radians?
2007-12-10 06:43:26 · 6 answers · asked by Flauta 2 in Science & Mathematics ➔ Mathematics
What's really sad is that for my College Pre-Cal final exam I got this question with these answer choices:
A) -pi/6
B) pi/6
C) pi
D) No solution in the domain
E) 1
F) None of the above
When I chose F, None of the above, it was marked as incorrect. I guess I'm going to have to dispute this with the professor. Thanks guys.
2007-12-10 06:58:50 · update #1
cos θ = 1/2
θ = π / 3 , 5 π / 3 (quadrants 1 and 4)
2007-12-10 09:17:07 · answer #1 · answered by Como 7 · 3⤊ 0⤋
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RE:
arccos(1/2)?
I'm pretty sure the answer is supposed to be pi/3, but I just wanted to confirm this. What is arccos(1/2) equal to in radians?
2015-08-05 21:25:13 · answer #2 · answered by Anonymous · 0⤊ 0⤋
pi/3.
2017-02-25 09:04:56 · answer #3 · answered by Sammy 1 · 0⤊ 0⤋
The correct answer is pi/3.
If you have copied the problem statement correctly, then F is the correct answer, and I suggest that you talk to your professor about it.
2007-12-10 07:59:19 · answer #4 · answered by Anonymous · 0⤊ 1⤋
it is
π/3 ( 1st quadrent) or 5π/3 ( 4th quadrent)
[remember that cos is +ve in 1st & 4th quadrent, & -ve in 2nd & 3rd
sin is +ve in 1st & 2nd & -ve in 3rd & 4th ]
2007-12-10 06:49:25 · answer #5 · answered by mbdwy 5 · 1⤊ 0⤋
it can be pi/3 or -pi/3 as you said
2007-12-10 06:47:51 · answer #6 · answered by Anonymous · 0⤊ 1⤋