trig/math
posted by sarah
3. Draw vectors u and v tailtotail so that they make a èdegree angle. Draw the vector u − v, the third side of the triangle, and check to see that it points in the right direction.
(a) Solve for cos è using the SSS version of the Law of Cosines, expressing all lengths in terms of u, v, and u − v.
(b) If you use vector algebra to simplify the numerator as much as possible, you will
discover an interesting new result connecting u•v to cos è.
Respond to this Question
Similar Questions

physics
1. A vector has (at minimum) how many parts associated with it? 
phys
1. A vector has (at minimum) how many parts associated with it? 
Discrete Math  Vectors
Can you please help me correct my answers for the following two questions? 
physics
A football player runs the pattern given in the drawing by the three displacement vectors A, B, and C . The magnitudes of these vectors are A = 5 m, B = 16.0 m, and C = 16.0 m. Using the component method, find the magnitude and direction … 
geometry
Let u = [2,−3, 1] and v = [0, 1, 4]. Calculate the vector u − v. Place u and v tailtotail to form two sides of a triangle. With regard to this triangle, what does u−v represent? 
math
Let u = [2,−3, 1] and v = [0, 1, 4]. Calculate the vector u − v. Place u and v tailtotail to form two sides of a triangle. With regard to this triangle, what does u−v represent? 
precalc
If is vector a ia 7 units long, the magnitude of vector b is 10 units and the cosine of the angle between the two vectors is 0.3 when they are placed tailtotail, what does the inner product of vector a and vector b equal? 
Precalc
Suppose vector a is 3 units long, the magnitude of vector b is 1 units and cos (θ) = 0.3, where θ is the angle between the two vectors when they are placed tailtotail. What does the inner product of vector a and vector … 
Calculus and vectors
Please help/verify the answer. 1. When you add vectors geometrically: a) vectors are aligned tail to tail b) vectors are aligned head to head c) vectors are aligned head to tail d) vectors are put side by side Is the answer D? 
Math
Can I get some help? 1. If v = (5, 3), 5 v^2 2. For the following vector v, find u, the unit vector with the same direction angle as v. V = 25j Does u = j?