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Tuesday, September 2, 2008

Paper Two : Q3

The phase difference is 90 degrees but the point of intersection is where the amplitude will be the greatest which is at 45 degrees. Hence to find the amplitude at 45 degrees , you need to substitute cos 45 degrees to the sin or cosine formula. The amplitude is 0.707 A . Apply principle of superposition the resultant amplitude will give 1.41 A.