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A particle acted upon by forces vec F(1)...

A particle acted upon by forces `vec F_(1)``vec F_(2)` and `vec F_(3)` ,is in equilibrium. Angle between `vec F_(1)` and `vec F_(2)` is `85^(0)` , angle between `vec F_(1)` and `vec F_(3)` is `175^(0)`. Angle between `vec F_(2)` and `vec F_(3)` is

(A) `100^(0)`

(B) `120^(0)`

(C) `130^(0)`

(D) depends on magnitudes of the forces

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