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Question

If A=3^i+4^j and B=6^i+63^j, find the angle between A and B (cos 37o=4/5)

A
23o
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B
16o
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C
7o
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D
none
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Solution

The correct option is C 7o

tan θA=43θA=53

tan θB=636θB=60
θBA=7

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