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Byju's Answer
Standard IX
Mathematics
Trigonometric Ratio(sin,cos,tan)
principle val...
Question
principle value of 2cot
-1
(7)+cos
-
1
(3/5) is equal to ?
Open in App
Solution
2
c
o
t
-
1
7
+
cos
-
1
(
3
5
)
I
f
θ
=
cos
-
1
(
3
5
)
t
h
e
n
cos
θ
=
3
5
⇒
c
o
t
θ
=
3
4
H
e
n
c
e
2
c
o
t
-
1
7
+
cos
-
1
(
3
5
)
=
2
c
o
t
-
1
7
+
c
o
t
-
1
3
4
=
c
o
t
-
1
(
7
2
-
1
2
×
7
)
+
c
o
t
-
1
3
4
=
c
o
t
-
1
(
24
7
)
+
c
o
t
-
1
(
3
4
)
=
c
o
t
-
1
(
24
7
×
3
4
-
1
24
7
+
3
4
)
=
c
o
t
-
1
(
44
28
117
28
)
=
c
o
t
-
1
(
44
117
)
=
69
.
39
°
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0
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