A) 7
B) 6
C) 5
D) 3.5
Correct Answer: B
Solution :
\[\varphi =\pi /3,\ {{a}_{1}}=4,\ {{a}_{2}}=3\] So, \[A=\sqrt{a_{1}^{2}+a_{2}^{2}+2{{a}_{1}}.{{a}_{2}}\cos \varphi }\Rightarrow A\approx 6\]You need to login to perform this action.
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