1.

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

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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