Let `vec(a) (x) = (sin x ) hat(i) + (cos x ) hat(j)` and `vec(b) (x) = ( cos 2x ) hat(i) + (sin 2x ) hat(j) ` be t

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Q 2270567416.     Let `vec(a) (x) = (sin x ) hat(i) + (cos x ) hat(j)` and `vec(b) (x) = ( cos 2x ) hat(i) + (sin 2x ) hat(j) `

be two varibale vectors `(x in R)`, then `vec(a) (x)` and `vec(b) (x) ` are
A

collinear for unique value of `x`,

B

perpendicular for infinitely many values of `x`

C

zero vectors for unique values of `x`

D

none of the above

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(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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