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Tardigrade
Question
Mathematics
Let fk(x) - (1/k) (sinkx + coskx) where x ∈ R and k ≥ 1. Then f4(x) -f6(x) equals
Q. Let
f
k
(
x
)
−
(
1/
k
)
(
s
i
n
k
x
+
co
s
k
x
)
w
h
ere
x
∈
R
an
d
k
≥
1.
T
h
e
n
f
4
(
x
)
−
f
6
(
x
)
e
q
u
a
l
s
2342
252
Report Error
A
1/4
8%
B
1/12
80%
C
1/6
7%
D
1/3
5%
Solution:
Correct answer is (b) 1/12