Problem 1E: Which of the following expressions are meaningful? Which are meaningless? Explain. (a) (a b) c (b)... Problem 2E: Find a b. 2.a=2,3, b=0.7,1.2 Problem 3E: Find a b. 3.a=2,13, b=5,12 Problem 4E: Find a b. 4. a = 6, 2, 3, b = 2, 5, 1 Problem 5E: Find a b. 5. a = 4, 1, 14, b = 6, 3, 8 Problem 6E: Find a b. 6. a. = p, p, 2p, b = 2q, q, q Problem 7E: Find a b. 7. a = 2i + j, b = i j + k Problem 8E: Find a b. 8. a = 3i + 2j k, b = 4i + 5k Problem 9E: Find a b. 9.|a|=6, |b|=5, the angle between a and b is 2/3 Problem 10E: Find a b. 10.|a|=3, |b|=6, the angle between a and b is 45 Problem 11E: If u is a unit vector, find u v and u w. Problem 12E: If u is a unit vector, find u v and u w. Problem 13E: (a) Show that i j = j k = k i = 0. (b) Show that i i = j j = k k = 1. Problem 14E Problem 15E: Find the angle between the vectors. (First find an exact expression and then approximate to the... Problem 16E: Find the angle between the vectors. (First find an exact expression and then approximate to the... Problem 17E Problem 18E: Find, correct to the nearest degree, the three angles of the triangle with the given vertices. 22.... Problem 19E Problem 20E: 1920 Determine whether the given vectors are orthogonal, parallel, or neither. 20. (a) u = 3, 9, 6,... Problem 21E: Use vectors to decide whether the triangle with vertices P(l, 3, 2), Q(2, 0, 4), and R{6, 2, 5) is... Problem 22E: Find the values of x such that the angle between the vectors 2, 1,1, and 1, x, 0 is 45. Problem 23E: Find a unit vector that is orthogonal to both i + j and i + k. Problem 24E: Find two unit vectors that make an angle of 60 with v = 3, 4. Problem 25E: Find the acute angle between the lines. 29. 2x y = 3, 3x + y = 7 Problem 26E: Find the acute angle between the lines. 30. x + 2y = 7, 5x y = 2 Problem 27E: Find the acute angles between the curves at their points of intersection. (The angle between two... Problem 28E: Find the acute angles between the curves at their points of intersection. (The angle between two... Problem 29E: Find the scalar and vector projections of b onto a. 39. a = 5, 12, b = 4, 6 Problem 30E: Find the scalar and vector projections of b onto a. 40. a = 1, 4, b = 2, 3 Problem 31E Problem 32E: Find the scalar and vector projections of b onto a. 32. a = i + j + k, b = i j + k Problem 33E Problem 34E: For the vectors in Exercise 30, find ortha b and illustrate by drawing the vectors a, b, proja b,... Problem 35E Problem 36E: Suppose that a and b are nonzero vectors. (a) Under what circumstances is compa b = compb a? (b)... Problem 37E Problem 38E: A tow truck drags a stalled car along a road. The chain makes an angle of 30 with the road and the... Problem 39E Problem 40E: A boat sails south with the help of a wind blowing in the direction S36E with magnitude 400 lb. Find... Problem 41E: Use a scalar projection to show that the distance from a point P1(x1, y1) to the line ax + by + c =... Problem 42E: If r = x, y, z a = a1, a2, a3, and b = b1, b2, b3, show that the vector equation (r a) (r b) = 0... Problem 43E Problem 44E Problem 45E Problem 46E: If c = | a | b + | b | a, where a, b, and c are all nonzero vectors, show that c bisects the angle... Problem 47E: Prove Properties 2.4, and 5 of the dot product (Theorem 2). Problem 48E: Suppose that all sides of a quadrilateral are equal in length and opposite sides are parallel. Use... Problem 49E: Use Theorem 3 to prove the Cauchy-Schwarz Inequality: | a b| | a | | b | Problem 50E: The Triangle Inequality for vectors is |a + b| (a) Give a geometric interpretation of the Triangle... Problem 51E: The Parallelogram Law states that |a+b|2+|ab|2=2|a|2+2|b|2 (a) Give a geometric interpretation of... Problem 52E format_list_bulleted