If a = (("Cos X","Sin X"),(-"Sin X","Cos X")) Then A-1 is Equal To: - Mathematics

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MCQ

If A = `(("cos x","sin x"),(-"sin x","cos x"))` then A-1 is equal to:

Options

  • `(("cos x","sin x"),("sin x","cos x"))`

  • `(("cos x","- sin x"),("sin x","cos x"))`

  • `(("cos x"," sin x"),("-sin x","cos x"))`

  • none of these

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Solution

`(("cos x","- sin x"),("sin x","cos x"))`

Concept: Number System (Entrance Exam)
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