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Determine one positive and one negative coterminal angle for the following angles.

1)  

2)  

 

also when writting these must i write it in correct notation such as using say [60, 420)?

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In a beehive, each cell is a regular hexagonal prism, open at one end with a trihedral angle at the other end as in the figure. It is believed that bees form their cells in such a way as to minimize the surface area for a given side length and height, thus using the least amount of wax in cell construction. Examination of these cells has shown that the measure of the apex angle is amazingly consistent. Based on the geometry of the cell, it can be shown that the surface area S is given by

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