1) 8дм2 2см2 - 58см2 96мм2 = 802см2 - 58,96см2 = 743,04см2 = 7дм2 43см2 4мм2.
Это числа 1,2 и 3, т.к.
1+2+3=6
1*2*3=6
1/cos^2 y-(sin^2 ycos^2 y)/cos^2 y-sin^2 y/cos^2 y=(1-sin^2 y cos^2 y-sin^2 y)/cos^2 y=(cos^2 y- sin^2 y cos^2 y)/cos^2 y=(cos^2 y(1-sin^2 y))/cos^2 y=cos^2 y
568+865=1433
1433+3341=4774
98+89=187
187+781=968
968+869=1837
1837+7381=9218
9218+8129=17347
17347+74371=91688
91688+88619=180307
180307+703081=883388