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Standing waves are produced by the superposition of two waves: y1 = 0.05 sin(3πt - 2X) and y2 = 0.05 sin(3πt + 2X), where x and y are expressed in metres and t is in seconds. Find the amplitude of a particle at x = 0.5m. (Given cos1 = 0.54; sin1 = 0.84; angle is in radian)
The value of cos1° cos2° cos3° ............. cos177° cos178° cos179° is?