Ответ:
Пошаговое объяснение:
a) 1/2+ =
б)1/2-
в)
г)sin(2*60)=sin120=
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Answers & Comments
Ответ:
Пошаговое объяснение:
a) 1/2+
=![\frac{1+\sqrt{3} }{2} \frac{1+\sqrt{3} }{2}](https://tex.z-dn.net/?f=%5Cfrac%7B1%2B%5Csqrt%7B3%7D%20%7D%7B2%7D)
б)1/2-![\frac{\sqrt{2} }{2} =\frac{1-\sqrt{2} }{2} \frac{\sqrt{2} }{2} =\frac{1-\sqrt{2} }{2}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Csqrt%7B2%7D%20%7D%7B2%7D%20%3D%5Cfrac%7B1-%5Csqrt%7B2%7D%20%7D%7B2%7D)
в)![\frac{\sqrt{2} }{2} *\frac{\sqrt{2} }{2} =\frac{2}{4} =0,5 \frac{\sqrt{2} }{2} *\frac{\sqrt{2} }{2} =\frac{2}{4} =0,5](https://tex.z-dn.net/?f=%5Cfrac%7B%5Csqrt%7B2%7D%20%7D%7B2%7D%20%2A%5Cfrac%7B%5Csqrt%7B2%7D%20%7D%7B2%7D%20%3D%5Cfrac%7B2%7D%7B4%7D%20%3D0%2C5)
г)sin(2*60)=sin120=![\frac{\sqrt{3} }{2} \frac{\sqrt{3} }{2}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Csqrt%7B3%7D%20%7D%7B2%7D)