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Byju's Answer
Standard XII
Mathematics
Orthogonal Matrix
State the fol...
Question
State the following statement is true or false
The statement "If
A
is an orthogonal matrix, then
A
′
=
A
−
1
" is
A
True
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B
False
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Solution
The correct option is
A
True
Orthogonal matrix
is a square matrix
with real
entries whose columns and rows are Orthogonal unit vectors.
Which implies
A
T
A
=
I
Now multiply with
A
−
1
on both sides , we get
A
T
A
A
−
1
=
I
A
−
1
⇒
A
T
=
A
−
1
Therefore given statement is true
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