Use vectors to find the measure of the angle at vertex B of triangle ABC, when A = (3,1), B = (-4, 3), and C = (-4,-2). Round answer to two decimal places. O 75.39⁰ O 71.96⁰ O 76.57⁰ O 74.05° O 72.86°

Q: 4. Show that a b

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A: 1.2. Graph for assumed magnitudes:

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Q: T5. If a = between the two vectors O 90° 00° (5, -3, 2) and b 60° O 180° = -5, 3, 2 find the angle

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Q: Find v-u. v=4i-7j and u= -9i+2j OA. -5i-5j OB. -50 O C. -36i-14j OD. -22

A: Given: v= 4i - 7j u= -9i+2j

Q: Find the angle between the pair of vectors to the nearest tenth of a degree. (9, -1), (-4,-1) 79.8°…

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