If two unit vectors have unit magnitide.Find the angle between them.
Answers
Answer:
1--Identify the vectors. Write down all the information you have concerning the two vectors.
2--Review the Law of Cosines. Take an ordinary triangle, with angle θ between sides a and b, and opposite side c. The Law of Cosines states that c2 = a2 + b2 -2abcos(θ). This is derived fairly easily from basic geometry
3--Connect two vectors to form a triangle. Sketch a pair of 2D vectors on paper.
4--Write the Law of Cosines for this triangle. Insert the length of our "vector triangle" sides into the Law of Cosines
5--Write this using dot products. Remember, a dot product is the magnification of one vector projected onto another. A vector's dot product with itself doesn't require any projection, since there is no difference in direction.
6--Rewrite it into the familiar formula. Expand the left side of the formula, then simplify to reach the formula used to find angles.
7--Mark as brainliest