Bab 5: Turunan Trigonometri
LATIHAN
• 1/5
No. 1
Lapor
Tentukan titik kritis dari fungsi
f
(
x
)
=
cos
(
2
x
)
+
2
sin
(
x
)
f(x) = \cos(2x) + 2 \sin(x)
f
(
x
)
=
cos
(
2
x
)
+
2
sin
(
x
)
pada interval
0
≤
x
≤
2
π
0 \le x \le 2\pi
0
≤
x
≤
2
π
.
A
π
6
,
5
π
6
,
3
π
2
\frac{\pi}{6}, \frac{5\pi}{6}, \frac{3\pi}{2}
6
π
,
6
5
π
,
2
3
π
B
π
2
,
7
π
6
,
11
π
6
\frac{\pi}{2}, \frac{7\pi}{6}, \frac{11\pi}{6}
2
π
,
6
7
π
,
6
11
π
C
π
6
,
π
2
,
5
π
6
\frac{\pi}{6}, \frac{\pi}{2}, \frac{5\pi}{6}
6
π
,
2
π
,
6
5
π
D
π
2
,
5
π
6
,
3
π
2
\frac{\pi}{2}, \frac{5\pi}{6}, \frac{3\pi}{2}
2
π
,
6
5
π
,
2
3
π
E
π
6
,
π
2
,
5
π
6
,
3
π
2
\frac{\pi}{6}, \frac{\pi}{2}, \frac{5\pi}{6}, \frac{3\pi}{2}
6
π
,
2
π
,
6
5
π
,
2
3
π
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