#理科生的文科日常

1.

a:y≤40sin(0.02x)

b:40sin(0.02x)≤y≤20cos(0.02x+20)

f:y=abs(5sin(0.3x))+ sqrt(x-π)- sqrt(x-π)+ sqrt(6π-x)- sqrt(6π-x)+50

g:y=abs(3sin(0.5 (x+30)))+ sqrt(1.5π- (x+30))- sqrt(1.5π- (x+30))+ sqrt(x+30+1.5π)- sqrt(x+30+1.5π)+30

2.

b:-0.5x+0.7sin(0.5x)≤y≤10sin(0.07x)+20

f:y=10

c:y≤-0.5x+0.7sin(0.5x)-10

d: (x+5)^(2)+ ((y-25)^(2))/(4)≤3

3.

a:y≤sin(0.1x)

b:sin(0.1x)≤y≤ sqrt(100-x^(2))