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please can anyone tell me that in the question 6 part 2 of following paper why the direction of line is taken as 'i' even tough its parallel to x axis,why not 7j??
http://maxpapers.com/wp-content/uploads/2012/11/9709_s13_qp_31.pdf
thanks in advance.
http://maxpapers.com/wp-content/uploads/2012/11/9709_s13_qp_31.pdf
thanks in advance.