1.

A non-zero vector bar(a), is parallel to the line of intersection of the plane determined by the vectors bar(i), bar(i) + bar(j) and the plane determined by the vectors bar(i)- bar(j), bar(i) + bar(k) Find the angle between bar(a) and the vector bar(i)- 2bar(j) + 2bar(k)

Answer»


ANSWER :`THETA= 45^(@) or 135^(@)`


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