Question

Two related questions.
What is the angle between two vectors if their magnitudes are 3 and 4 and their cross product is 5?
What unit does this cross product have if each vector was expressed in meters?
Two related questions.
What is the angle between two sides of a triangle if the lengths of the sides are 3 m and 4 m and the area of the triangle is 5 m2?
What is the length of the remaining side?

Answer 1

the cross product of course will have the same unite as the tow vectors which is meter .
2
from the draw and the formula given we can find the angle between the tow vectors The length of the remaining side is as on the draw