"A rain gutter is to be constructed from a metal sheet of width 30 cm by bending up one-third of the sheet on each side through an angle (theta)(adsbygoogle = window.adsbygoogle || []).push({});

Show that the cross-sectional area of the gutter is modeled by the function A(theta)=100sin(theta)+100sin(theta)cos(theta)"

My Question:

what is meant by cross-sectional?

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# Homework Help: Find the cross-sectional area of a gutter

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