The sound produced by a jet engine was measured at a distance of 100 m in all directions The loudness of the sound d (in decibels) was found to be d 115 10 cos, where the 0 line for the angle is directed in front of the engine Sketch the graph of d vs in polar coordinates (use d as r)

Question: The sound produced by a jet engine was measured at a distance of 100 m in all directions. The loudness of the sound d (in

The sound produced by a jet engine was measured at a distance of 100 m in all directions. The loudness of the sound d (in decibels) was found to be d = 115 + 10 cosθ, where the 0° line for the angle θ is directed in front of the engine. Sketch the graph of d vs. θ in polar coordinates (use d as r).

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