U = 9i – 6j
v = 7i + 4j
A) 63.43°
C) 173.66°
B) 109.48°
D) 101.31°

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  A)  63.43°

Step-by-step explanation:

The two vectors in polar form are ...

  u = (√(9²+6²))∠arctan(-6/9) = √117∠-33.69°

  v = (√(7²+4²))∠arctan(4/7) = √65∠29.74°

The angle between the two vectors is ...

  29.74° -(-33.69°) = 63.49°

1: -2 3/4, -2 1/2, -14, 0, 3, 8 1/3

2: -4, -3, -2 1/2, -2 1/4, 3 1/4,

step-by-step explanation:

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step-by-step explanation:

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