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Select the correct option from the given alternatives.If ` A = [[cosalpha,sinalpha],[-sinalpha,cosalpha]]` then `A^-1` = ? `1) [[frac{1}{cosalpha},-frac{1}{sinalpha],[frac{1}{sinalpha},frac{1}{cosalpha]]` 2)`[[cosalpha,-sinalpha],[sinalpha,cosalpha]]` 3)`[[-cosalpha,sinalpha],[-sinalpha,cosalpha]]` 4)`[[-cosalpha,sinalpha],[sinalpha,-cosalpha]]`

A

`[[frac{1}{cosalpha},-frac{1}{sinalpha],[frac{1}{sinalpha},frac{1}{cosalpha]]`

B

`[[cosalpha,sinalpha],[-sinalpha,cosalpha]]`

C

`[[-cosalpha,sinalpha],[-sinalpha,cosalpha]]`

D

`[[-cosalpha,sinalpha],[sinalpha,-cosalpha]]`

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CHETANA PUBLICATION-Matrices-EXERCISE
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