finally realized my error arithmatic; could have solved with Pythagorean theorem if had squared the 144 vector magnitude in exercise 1.2; this would have resulted in 144/square root of 2 = to 72 times square root of 2 for the components X and Y.
rewriting per suggestions received;
exercise 1.3 of chapter 3: In Exercise 1.2 if ex and ey lie along nthe perpendicular lines, and ex has a magnitude of 4, and ey has a magnitude of 6, what are the components of the vector relative to the reference frame defined by the base vectors ex and ey...
Homework Statement
Exercise 1.3, chapter 3: if e[SUB]x and e[SUB]y lie along perpendicular lines, and e[SUB]x has a magnitude of 4 and e[SUB]y has a magnitude of 6, what are the components of the vector relative to the reference frame defined by the base vectors e[SUB]x and e[SUB]y...