Let |→a|=5, |→b|=3 and the angle between vectors →a and →b is – InterviewSolution

1.	Let \|→a\|=5, \|→b\|=3 and the angle between vectors →a and →b is 60∘. Then the value of (6→a+→b).(4→a+7→b) is ______
Answer» Let $\| \to a \| = 5, \| \to b \| = 3$ and the angle between vectors $\to a$ and $\to b$ is $60^{\circ}$ . Then the value of $(6 \to a + \to b) . (4 \to a + 7 \to b)$ is ______

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