Answer:
Step-by-step explanation:
the cost is $111
x+4/x-4
=x/(x-4)+4/(x-4) [ l.c.m= (x-4)]
=x+4/x-4
y = sin x/2
y = a.sin.bx
a = y max= 2
y = a.sin.bx = 2.sin.bx
sin.bx = sin x/2
b=1/2
so
y=sin x/2
look at the picture