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Problem
Problem
sin
3
α
cos
2
α
<
0
\frac{\sin 3\alpha}{\cos 2\alpha} < 0
c
o
s
2
α
s
i
n
3
α
<
0
if
α
\alpha
α
lies in a.
(
13
π
/
48
,
14
π
/
48
)
(13\pi/48, 14\pi/48)
(
13
π
/48
,
14
π
/48
)
b.
(
14
π
/
48
,
18
π
/
48
)
(14\pi/48, 18\pi/48)
(
14
π
/48
,
18
π
/48
)
c.
(
18
π
/
48
,
23
π
/
48
)
(18\pi/48, 23\pi/48)
(
18
π
/48
,
23
π
/48
)
d. any of these intervals
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