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Write the projection of hat i - hat j in...

Write the projection of `hat i - hat j` in the direction of `hat i - hat j` .

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What is the projection of hat i + hat j - hat k upon the vector hat i ?

Find the projection of the vector hat(i)-hat(j) on the vector hat(i)+hat(j) .

Find the area of the parallelogram whose adjacent sides are gives by the vectors. 2 hat i + hat j + hat k and 2 hat i + hat j - hat k .

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