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In a triangle ABC, if |−−→BC|=3,|−−→CA|=5 and |−−→BA|=7, then the projection of the vector −−→BA on −−→BC is equal to: |
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Answer» In a triangle ABC, if |−−→BC|=3,|−−→CA|=5 and |−−→BA|=7, then the projection of the vector −−→BA on −−→BC is equal to: |
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