Find a b. |a| = 40, |b| = 30, the angle between a and b is 3t/4. 1200 Need Help? Read It

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Q: Find a · b. |a| 40, |b| = 30, the angle between a and b is 37/4. %3D

A: |a| = 40, |b| = 30 and the angle between a and b is 3pi/4. We have to find the dot product a.b.

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