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The resultant of two forces P and Q acting at an angle θ=

A√(P² + Q² + 2PQ Sinθ )

B√(P² + Q² + 2PQ Cosθ )

C√(P² - Q² - 2PQ Sinθ )

D√(P² + Q² - 2PQ Sinθ )

Answer:

B. √(P² + Q² + 2PQ Cosθ )


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