Referring to the vectors in the figure, express the sum {\rm \vec A} + {\rm \vec B} + {\rm \vec C} in unit vector notation
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1.39 .. (a) Write each vector in Fig. E1.39 in terms of the unit vectors î and ſ. (b) Use unit vec- tors to express vector C, where C = 3.00 A – 4.00 B. (c) Find the magnitude and direction of C.
1.44 . Find the vector product A XB (expressed in unit vec- tors) of the two vectors given in Exercise 1.38. What is the magni- tude of the vector product?
1.47. For the two vectors A and D in Fig. E1.24, find the mag- nitude and direction of (a) the vector product A XĎ; (b) the vec- tor product D XA