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Posted by **Mykmoloko** on Wednesday, February 9, 2011 at 12:22am.

- physical science -
**drwls**, Wednesday, February 9, 2011 at 12:37amThe range of a projectile is proportional to sin A cos A. If you change the launch angle (A) to its complement (15 degrees in this case), you get the same result.

- physical science -
**Mykmoloko**, Wednesday, February 9, 2011 at 5:48amwow! thank you for your help. I thout there is no one who can help me.

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