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Byju's Answer
Standard XII
Mathematics
Integration by Partial Fractions
∫1-cos x/cos ...
Question
∫
1
−
cos
x
cos
x
(
1
+
cos
x
)
d
x
.
A
log
(
sec
x
−
tan
x
)
−
2
tan
x
2
.
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B
log
(
sec
x
+
tan
x
)
−
tan
x
2
.
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C
log
(
sec
x
+
tan
x
)
+
2
tan
x
2
.
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D
log
(
sec
x
+
tan
x
)
−
2
tan
x
2
.
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Solution
The correct option is
D
log
(
sec
x
+
tan
x
)
−
2
tan
x
2
.
1
−
cos
x
cos
x
(
1
+
cos
x
)
=
1
cos
x
−
2
1
+
cos
x
P.F.'S
∴
I
=
∫
[
sec
x
−
2
/
2
cos
2
(
x
/
2
)
]
d
x
=
log
(
sec
x
+
tan
x
)
−
2
tan
x
2
.
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