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Question

If A(α,β)=cos αsin α0sinαcosα000eβ, then A(α,β)1 in terms of function of α,β is

A
A(α,β)
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B
A(α,β)
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C
A(α,β)
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D
none of the above
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Solution

The correct option is B A(α,β)
|A(α,β)|=cos2αeβ+sin2αeβ=eβ
Now, A(α,β)1=1eβadj (A(α,β))

=1eβeβcosαsinαeβ0eβsinαcosαeβ0001

=cosαsinα0sinαcosα000eβ

=A(α,β)

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