If , and the angle between them is , then the value of…

MATHEMATICS · Single correct · A Level · Mathematics · Vectors · Vectors

Problem

|\mathbf{a}| = 5

|\mathbf{b}| = 7

and the angle between them is

90^\circ

, then the value of

\mathbf{a}\cdot\mathbf{b}

is (a)

35

(b)

-35

(c)

0

(d)

12