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प्रश्न
If A = `(("cos x","sin x"),(-"sin x","cos x"))` then A-1 is equal to:
पर्याय
`(("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
MCQ
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उत्तर
`(("cos x","- sin x"),("sin x","cos x"))`
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Number System (Entrance Exam)
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