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Question

The angle between the tow vectors $$\vec{A}=5\hat{i}+5\hat{j}$$ and $$\vec{B}=5\hat{i}-5\hat{j}$$ will be


A
Zero
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B
45o
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C
90o
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D
180o
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Solution

The correct option is D $$90^{o}$$
AS we find that
$$\vec A.\vec B=0$$
so,
$$\vec{A}.\vec{B}=0\therefore \theta=90^{o}$$

Physics

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