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Mathematics
Mathematics
Problem
9. Prove that
y
=
4
sin
θ
(
2
+
cos
θ
)
−
θ
y=\frac{4 \sin \theta}{(2+\cos \theta)}-\theta
y
=
(
2
+
c
o
s
θ
)
4
s
i
n
θ
−
θ
is an increasing function of
θ
\theta
θ
in
0
,
π
2
0, \frac{\pi}{2}
0
,
2
π
.
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