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Mathematics
Mathematics
Problem
If
x
x
x
lies in the interval
(
π
,
3
π
/
2
)
(\pi,\,3\pi/2)
(
π
,
3
π
/2
)
and
sin
x
=
−
4
5
\sin x=-\dfrac{4}{5}
sin
x
=
−
5
4
, what is the sign of
cos
x
\cos x
cos
x
? a) Positive b) Negative c) Zero d) Depends on the value of
x
x
x
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