Зробіть графік функції
у=(0,25)x

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1)199*201=(200-1)*(200+1)= 200^2 -1^2 = 40000-1 =39999

2)135^2-35^2=(135-35)*(135+35)=100(135+35)=100*170=17000

3)17.5^2-9.5^2:131.5^2-3.5^2=35^2-19^2:69120=(35-19)*(35+19):69120=16*(35+19):69120=16*54:69120=864:69120=1:80

4)(52^2-37^2: 52^2-32^2)+(39^6-36^2: 45^2-30^2)= ((52-37)*(52+37): 52^2-32^2)+(39^6-36^2: 45^2-30^2)= ((52-37)*(52+37):(52-37)*(52+37) )+(39^6-36^2: 45^2-30^2)=(15*89):(25*89)+(39^6-36^2: 45^2-30^2)=(1335:225)+(39^6-36^2: 45^2-30^2)=(3:5)+(39^6-36^2: 45^2-30^2)= (0.6) +(39^6-36^2: 45^2-30^2)= (0.6) +(1521-36^2: 45^2-30^2)= (0.6) +(1521 -6^4: 45^2-30^2)= (0.6) +(1521 -6^4: (45-30)*(45+30))= (0.6) +(1521 -6^4: 45^2-30^2)= (0.6) +(1521-1296: (45-30)*(45+30))= (0.6) +(1521-1296: (15*75))= (0.6) +(225:1125)= (0.6) +(1:5)= (0.6) +(0.2)=0.8

5) (41^2-17^2: 37^2-21^2)-(39^2-27^2: 45^2-21^2)= ((41-17)*(41+17): (37-21)*(37+21))-(39^2-27^2: 45^2-21^2)= (24*58:16*58)-(39^2-27^2: 45^2-21^2)= (1392:928)-(39^2-27^2: 45^2-21^2)= (3:2)-(39^2-27^2: 45^2-21^2)= (1.5)-(39^2-27^2: 45^2-21^2)= (1.5)-((13*3)^2-3^6: 45^2-21^2)= (1.5)-((13*3)^2-3^6: (45-21)*(45+21))= (1.5)-(13^2*3^2-3^6: (45-21)*(45+21))= (1.5)-(13^2*3^2-3^6: 24*66)= (1.5)-((13^2-3^4)*3^2: 24*66)= (1.5)-((13^2-3^4)*3^2:1584)= (1.5)-((169 -81)*9:1584)= (1.5)-(88*9:1584)= (1.5)-(9:18)= (1.5)-(1:2)= (1.5)-(0.5)=1

Объяснение:

Если просто ответы:

1)39999

2)17000

3)1:80

4)0,8

5)1

1tg(-a)*cosa+sina=-tga*cosa+sina=-sina*cosa/cosa +sina=-sina+sina=0 2 cos²a*tg²(-a)-1=cos²a*tg²a-1=cos²a*sin²a/cos²a-1=sin²a-1=-cos²a 3 ctg(-b)*sinb/cosb=-ctgb*sinb/cosb=-cosb*sinb/(sinb*cosb)=-1 4 (1-tg(-x))/(sinx+cos(-x))=(1+tgx)/(sinx+cosx)=(1+sinx/cosx)*1/(sinx+cosx)= =(cosx+sinx)/cosx*1/(sinx+cosx)=1/cosx 5 ctga*sin(-a)-cos(-a)=-ctga*sina-cosa=-cosa*sina/sina-cosa=-cosa-cosa= =-2cosa 6 tg(-u)ctgu+sin²u=-tgu*ctgu+sin²u=-1+sin²u=-cos²u 7 (1-sin²(-y))/(cosy=(1-sin²y)/cosy=cos²y/cosy=cosy 8 (tg(-x)+1)/(1-ctgx)=(-tgx+1)/(1-ctgx)=(-sinx/cosx+1): (1-cosx/sinx)= =(cosx-sinx)/cosx*sinx/(sinx-cosx)=-tgx