<span>Sin 5п/6 - sin п/6=sin(π-π/6)-sinππ/6=sinπ/6-sinπ/6=0
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Б (0,2) (-2,2) (-2,4) (-1,5) (3,5) (4,4) (4,1) (3,0) (4,-1) (4,-5) (3,-6) (-1,-6) (-2,-5) (-2,-3) (0,-3)
это к цифре №3
-3,5+V400-7 2/5+K=2015
-35/10+20-37/5+k=2015
-35/10-37/5+20+k=2015
-72+200+k=2015
-128+k=2015
k=2015+128
k=2143
A²+2a+1=(a+1)²
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