Find a ·

b. |a| = 3, |b| = 14, the angle between a and b is 45° $$7.94 incorrect: your answer is incorrect.

Question

Amir King

Mathematics

6 March, 23:23

Find a ·

b. |a| = 3, |b| = 14, the angle between a and b is 45° $$7.94 incorrect: your answer is incorrect.

+1

Answers (1)

Know the Answer?

Allison Mcdaniel · Answer 1

a · b = |a| |b| cos (theta)

=|a| * 14 * cos (45)

a · b |a| = 3

=>

|a| * 14 * cos (45) * |a| = 3

|a| ² = 3 / (14cos (45))

|a| = sqrt (3 / (14cos (45)))

=0.63868 (approx.)

Find a ·b. |a| = 3, |b| = 14, the angle between a and b is 45° $$7.94 incorrect: your answer is incorrect.

Find a ·

b. |a| = 3, |b| = 14, the angle between a and b is 45° $$7.94 incorrect: your answer is incorrect.