Question: 9.As the angle between two force vectors increases from 10 to 170, the resultant R of the two vectors: (a) increases (b) decreases (c)

9.As the angle θ between two force vectors increases from 10° to 170°, the resultant R of the two vectors:
(a) increases (b) decreases (c) increases at first, then decreases (d) decreases at first, then increases

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