If vector A = (5i + 7j - 3k) and vector B = -2j + 2i - Ck are perpendicular to each other, then value of C will be:

Question

If  \(\overset{\rightarrow}A = (5\hat{i} + 7\hat{j} -3\hat{k} ) \ and\ \overset{\rightarrow}B = -2\hat{j} + 2\hat{i} - C\hat{k}\) perpendicular to each other, then value of C will be:

(a) 2

(b) 6

(c) -8

(d) -7

Answer 1

Correct option is : (c) -8