Prove that cos(01 +02) = cos01cos02 – sind1 sind2 by considering the dot product of the unit vectors v1 and v2. These vectors are at the angles 01 above the x-axis and 02 below the x-axis, respectively. 19 V. -1 |1

Q: 4. Show that a b

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Q: Find the angle θ between the two vectors.

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