December 2019 1 117 Report
Sendo x um arco do primeiro quadrante e sen x = 0,3. O valor sen2x vale:

a) 0,06\sqrt{91}
b) 0,6\sqrt{91}
c) 0,3\sqrt{91}
d) 0,03\sqrt{91}
e) -0,06\sqrt{91}
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