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JEEMAIN and NEET
>>
Mathematics
>>
Class12
>>
Vector Algebra
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Q)
If
→
a
,
→
b
,
→
c
are unit vectors and
→
a
+
→
b
+
→
c
is also a unit vector and
α
,
β
,
γ
are angles between
→
a
a
n
d
→
b
,
→
b
a
n
d
→
c
→
c
a
n
d
→
a
respectively, then among the three angles,
(
a
)
A
l
l
t
h
e
a
n
g
l
e
s
a
r
e
a
c
u
t
e
(
b
)
A
l
l
a
r
e
r
t
.
a
n
g
l
e
s
.
(
c
)
A
t
l
e
a
s
t
o
n
e
i
s
o
b
t
u
s
e
.
(
d
)
N
o
n
e
o
f
t
h
e
s
e
.
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