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If you an engineer, can you contact me so i can ask a series of questions concerning your field? Cosine theta is √2/2, find angle in measures of degrees and radians.? How to solve this 2nd order differential equation x²(d²y/dx²)+4x(dy/dx)+2y=ln x, x>0
using substitution x=e^u? The D string on a certain guitar is 153 N. The string's linear mass density is 0.007 kg/m. What is the speed of the waves on the string? Which is greater 2/2 or 5/4?