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Q.

If the vector $\bar{A} = 4 \hat{i} + 3 \hat{j}$ is rotated about its head in X-Y plane by an angle of $270 °$ in clockwise direction then the vector changed to $P \hat{i} + Q \hat{j}$ then what is the value of $P + Q$

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Detailed Solution

$\vec{B} = - 3 \hat{i} + 4 \hat{j}$

$P = - 3$ ; $Q = 4$

$P + Q = 1$

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