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11

If and find

25

If and find

36

The two adjacent sides of a parallelogram are and . Find the two unit vectors parallel to its diagonals. Using the diagonal vectors, find the area of the parallelogram.

17

If and , find .

[Correction in the Question – should be or else it’s not possible to find the value.]

26

Find λ, if .

1

Mark the correct alternative in each of the following:

If is any vector, then