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Let A=hatiA cos theta+hatj A sin theta b...

Let `A=hatiA cos theta+hatj A sin theta` be any vector .Another vector B which is perpendiculaar to A can be expressed as

A

`hatiB cos theta + hatj B sintheta

B

`hatiBsin theta + hatjB costheta `

C

`hatiB sintheta - hatjB cos theta `

D

`hatiA costheta- hatj A sin theta`

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