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0 Calculate modulus of cos PI/19 + i sin PI/19 (modulus of a complex number) 0

0 Solve 2x+9=0 (first degree equation) 0

0 Solve 2x+8=0 (first degree equation) 0

0 Solve 2x+7=0 (first degree equation) 0

+1 Solve 2x+6=0 (first degree equation) +1

0 Solve 2x+5=0 (first degree equation) 0

0 Solve 2x+4=0 (first degree equation) 0

0 Solve x+12<=0 (first degree inequality) 0

0 Solve x+11<=0 (first degree inequality) 0

0 Solve x+10<=0 (first degree inequality) 0