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Which of the following equals the a x b ( a and b are two vectors)?(a) – (a x b)(b) a.b(c) b x a(d) – (b x a)This question was posed to me in exam.This key question is from Computational Geometry topic in portion Computational Geometry of Data Structures & Algorithms II

Answer»

The correct ANSWER is (d) – (b x a)

Easiest EXPLANATION - The vector PRODUCT a x b is equal to – (b x a). The MINUS sign shows that these vectors have opposite DIRECTIONS.



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