Need help with trigonometry calculate.

Hi I am new to C++ and have to right a trigonometry calculate to work out the angles, area and length of the sides of a triangle, from information given by a user. The user can give the information in any form i.e. a side and a angel or just two angles etc. I am at a lose and have no idea were to start, could some one give me something to go one, I do know the basics but this is beyond me.

What sample output will you be expecting.
Give input and output.
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