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Mathematics, 18.10.2019 16:50 durham953

Arain gutter is to be constructed of aluminum sheets 12 inches wide after marking off legs 4 inches from each edge this blank is bent up at in angle theta the area a of the opening may be expressed as the function a theta equals 16 sin theta times cos theta + 1. if theta = 90 degrees, what is the area of the opening

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