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In a trapezium ABCD vec(AB)=3hati, vec(...

In a trapezium ABCD `vec(AB)=3hati, vec(AD)=hati+2hatj ,vec(DC)=2hati`. Find `vec(BC),vec(BD),vec(AC) and angleBAD`.

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The correct Answer is:
`-hati+2hatj,=3hati+2hatj,3hati+2hatj, tan^(-1) 2`
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