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Trigonometry
medium
0:00.0
If
tan
(
x
)
=
1
\tan(x) = 1
tan
(
x
)
=
1
, find the value of
cos
(
2
x
)
\cos(2x)
cos
(
2
x
)
.
A
1
1
1
B
0
0
0
C
−
1
-1
−
1
D
1
/
2
1/2
1/2
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