"|"oversetrightarrow(a).oversetrightarro...

`"|"oversetrightarrow(a).oversetrightarrow(b)"|"=sqrt3"|"oversetrightarrow(a)xxoversetrightarrow(b)"|"`, then the angle between `oversetrightarrow(a)andoversetrightarrow(b)` is:

`(pi)/(6)`

`(pi)/(4)`

`(pi)/(3)`

`(pi)/(2)`

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