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Mathematics
Problem
The matrix
S
S
S
is rotation through an angle
45
∘
45^\circ
4
5
∘
and
G
G
G
is the reflection about the line
y
=
2
x
y = 2x
y
=
2
x
, then
(
S
G
)
2
(SG)^2
(
S
G
)
2
is equal to a. 7I b. 5I c. 3I d. I
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