If `vecA=(1)/sqrt(2)cos theta hati+(1)/sqrt(2)sin thetahatj`, what will be the unit vector perpendiuclar to `vecA`.

If `vecA=(1)/sqrt(2)cos theta hati+(1)/sqrt(2)sin thetahatj`, what will be the unit vector perpendiuclar to `vecA`.
A. `cos theta hati+sin thetahatj`
B. `-cos theta hati+sin thetahatj`
C. `(cos thetahati+sin thetahatj)/sqrt(2)`
D. `sin thetahati-cos theta hatj`

If `vecA=(1)/sqrt(2)cos theta hati+(1)/sqrt(2)sin thetahatj`, what will be the unit vector perpendiuclar to `vecA`.

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