Evaluate the following expressions. Your answer must be an exact angle in radians and in the interval
[
0
,
π
]
\displaystyle {\left[{0},\pi\right]}
[
0
,
π
]
. For example, type
pi/6
for
π
6
\displaystyle \frac{\pi}{{6}}
6
π
.
arccos
(
−
1
2
)
=
\displaystyle {\arccos{{\left(-{\frac{{{1}}}{{{2}}}}\right)}}}=
arccos
(
−
2
1
)
=
Preview
Question 6 Part 1 of 3
arccos
(
−
2
2
)
=
\displaystyle {\arccos{{\left(-{\frac{{\sqrt{{{2}}}}}{{{2}}}}\right)}}}=
arccos
(
−
2
2
)
=
Preview
Question 6 Part 2 of 3
arccos
(
−
3
2
)
=
\displaystyle {\arccos{{\left(-{\frac{{\sqrt{{{3}}}}}{{{2}}}}\right)}}}=
arccos
(
−
2
3
)
=
Preview
Question 6 Part 3 of 3
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\displaystyle