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If P + Q = Rand IPI = IQI = and IRI = 3, then the angle between P and Q is
detailed solution
Correct option is C
Resultant, R=P2+Q2+2PQcosθ3=(3)2+(3)2+2(3)(3)cosθSquaring both sides in the above equation, we get 9 = 3 + 3+ 6 cos θ⇒ cosθ=12⇒θ=60° or π3Talk to our academic expert!
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Three forces 9 N, 12 N and 15 N acting at a point are in equilibrium the angle between 9 N and 15 N is
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