Two vectors A and B of magnitude 5 units
and 7 units respectively make an angle 60°
with each other as shown below. Find the
magnitude of the resultant vector and its
direction with respect to the vector Ā.
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Answer:
May be this explanation can help you
Explanation:
resultant=√5^2+7^2+2×5×7cos60=
√25+49+70×1/2=
√74+35=
√109
Direction tan beta=bsin threta/a+bcosthreta=
7sin60/5+7cos60
7√3/2÷ 5+7×1/2
3.5√3/8.5
0.71
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