vectors

Question: The resultant of $\overrightarrow P $ and $\overrightarrow Q $ is perpendicular to $\overrightarrow P $. What is the angle between $\overrightarrow P $ and $\overrightarrow Q $

1) ${\cos ^{ - 1}}(P/Q)$

2) ${\cos ^{ - 1}}( - P/Q)$

3) ${\sin ^{ - 1}}\,(P/Q)$

4) ${\sin ^{ - 1}}\,( - P/Q)$

Solution:

Explanation: Explanation

addition-subtraction-vectors

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