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Problems
f
(
x
)
=
cos
2
x
+
cos
2
(
π
3
+
x
)
−
cos
x
⋅
cos
(
x
+
π
3
)
f(x) = \cos^2 x + \cos^2\left(\frac{\pi}{3} + x\right) - \cos x \cdot \cos\left(x + \frac{\pi}{3}\right)
f
(
x
)
=
cos
2
x
+
cos
2
(
3
π
+
x
)
−
cos
x
⋅
cos
(
x
+
3
π
)
…
Mathematics
Problem
f
(
x
)
=
cos
2
x
+
cos
2
(
π
3
+
x
)
−
cos
x
⋅
cos
(
x
+
π
3
)
f(x) = \cos^2 x + \cos^2\left(\frac{\pi}{3} + x\right) - \cos x \cdot \cos\left(x + \frac{\pi}{3}\right)
f
(
x
)
=
cos
2
x
+
cos
2
(
3
π
+
x
)
−
cos
x
⋅
cos
(
x
+
3
π
)
is a. an odd function b. an even function c. a periodic function d.
f
(
0
)
=
f
(
1
)
f(0) = f(1)
f
(
0
)
=
f
(
1
)
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