Evaluate the following expression. Your answer must be in exact form: for example, type
pi/6
for
π
6
\displaystyle \frac{\pi}{{6}}
6
π
or
DNE
if the expression is undefined.
cos
(
arccos
(
−
0.5
)
)
=
\displaystyle {\cos{{\left({\arccos{{\left(-{0.5}\right)}}}\right)}}}=
cos
(
arccos
(
−
0.5
)
)
=
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Question 6
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\displaystyle