The Lengths of Two Vectors a and B, and the Angle

question 67

Essay

The lengths of two vectors a and b, and the angle $\theta$ between them, are given. Find the length of their cross product, $| \mathbf { a } \times \mathbf { b } |$ . $| \mathbf { a } | = 4 , |\mathbf { b }| = 5 , \theta = 60 ^ { \circ }$

---

Definitions:

Menarche

The first occurrence of menstruation in a female, symbolizing the onset of reproductive ability.

Identity

The qualities, beliefs, personality, looks, and expressions that make a person (self-identity) or group (particular social category or social group).

Integrity

The quality of being honest and having strong moral principles, or the state of being whole and undivided.

Basic Trust

An essential belief in the reliability and predictability of the world, typically established in early childhood.