The trick is to divide the numeral by the out of number and Multiply it by 100 ie 6/28 multiplied by 100 = 21,43%
We know,
sin(x) and cos(x) have minimum value equal to -1 and maximum value is 1.
Maximum value of sin(x) is 1
So we replace sin by 1 in our given equation

When we replace sin by 1 we will get

y= -2+5 = 3
So maximum value is 3
.21 as a fraction would be 21/100
Firstly, we will select three corner points
A=(2,3)
B=(6,8)
C=(7,4)
we are given
the transformation with the rule (x, y)→(x, −y)
y--->-y
so, it is reflected about x-axis
so, we will multiply y-value by -1
we get new points as
A=(2,-3)
B=(6,-8)
C=(7,-4)
now, we can locate these points and draw graph
we get