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1. |
*$_The ratio of the ranges on the inclined plane with motion upward and with motion downward for a given velocity, angle of projection will be? |
A. | sin (α + β)/sin (α - β) |
B. | sin (α - β)/sin (α + β) |
C. | cos (α - β)/cos (α + β) |
D. | tan (α - β)/tan (α + β) |
Answer» C. cos (≈í¬± - ≈í‚â§)/cos (≈í¬± + ≈í‚â§) | |