Обчисліть sin
[tex] \frac{5\pi}{4} [/tex]
А.
[tex] \frac{1}{2} [/tex]
Б.
[tex] - \frac{1}{2} [/tex]
В.
[tex] \frac{ \sqrt{2} }{2} [/tex]
Г.
[tex] - \frac{ \sqrt{2} }{2} [/tex]
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