1.

There are 6 vectors: a, b, c, d, e, f. Simply the following expression: [ a(b . c) X (e . f)d ] X [ a d ]. X represents cross product while . represents dot product. Vectors a & d are perpendicular.

A. 0
B. <strong>(b . c)(e . f) [ d + a ]</strong>
C. <strong>(b . c)(e . f) [ d a ]</strong>
D. <strong>(b . c)(e . f) [ d X a ]</strong>
Answer» C. <strong>(b . c)(e . f) [ d a ]</strong>


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