If you really mean meet at 50 degrees at peak (like very steep)
rafter 25 degrees from vertical, horizontal length = 6.3
so
sin 25 = 6.3/h
A cottage under construction is to be 12.6m wide. The two sides of the roof are to be supported by rafters that meet at an angle of 50°. How long should the rafters be if they are the same length?
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