Function Identity cos(log x) (Jee Mains) | ExamDuo
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Basic Ratios, Identities & Formulas
Medium
Function Identity cos(log x)
If f (x) = cos (log
e
x), then f (x) f (y) -
1
2
[
f
(
y
x
)
+ f (xy)
]
has the value
SELECT ONE OPTION
A
1
B
1
2
C
-2
D
0
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