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
B
45o
C
90o
D
180o

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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