If a and b are two units vectors inclined at an angle of 60^{circ} to each other, then

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3-1.Vectors

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If $a$ and $b$ are two units vectors inclined at an angle of $60^{\circ}$ to each other, then

A$| a + b | > 1$

B$|a+b| < 1$

C$| a - b | > 1$

D$|a-b| < 1$

Solution

(a)
$\vec{A}+\vec{B} =\sqrt{1+1+2 \times 1 \times 1 \cos 60}$
$=\sqrt{3} > 1$

Standard 11

Physics

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