Question

Find angle between A and B, where,

(a). A=2^i and B=-6^i
(b).A=6^j and B=-2^k
(c).A=(2^i-3^j) and B=4^k
(d).A=4^i and B=(-3^i+3^j)







Note : ^ = cap or caret
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Answer 1

Answer:

123

Explanation: