представьте в виде суммы:
1) [tex]sin23 sin32[/tex]
2)[tex]cos\frac{\pi }{12} cos\frac{\pi }{8}[/tex]
3)[tex]sin14cos16[/tex]
4)[tex]2sin\frac{\pi }{8} cos\frac{\pi }{5}[/tex]
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