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A positive angle less than 2pi that is coterminal with 23pi/3 is? Find the sum to n terms of the series, 2+4(1/5)+6(1/5)²...,and deduce the sum to infinity.? Why does launching an object at 45 degrees result in the maximum range. without calculation? A 1.38-kg book is at rest on a wooden board inclined at 13 degrees. Find the magnitude of the force of static friction.? A farmer rejects 2 out of every 7 apples. If the farmer picks 973 apples, find how many apples were rejected. How do I solve this?