n = 15108097
k = n Mod 10000
T = n Mod 100
pi = 4 * Atn(1)
g = 10
x = (11 - 1 / T)
y = 2.5 - 1 / k
v = 30
a = g * x ^ 2 / 2 / v ^ 2
b = -x
c = g * x ^ 2 / 2 / v ^ 2 + y
c = a + y
N1 = (-b + Sqr(b ^ 2 - 4 * a * c)) / (2 * a)
'N1 = Atn(N1)
'N1 = 180 * N1 / pi
'MsgBox N1

N2 = (-b - Sqr(b ^ 2 - 4 * a * c)) / (2 * a)
'N2 = Atn(N2)
'N2 = 180 * N2 / pi
'MsgBox N2

'
y = 2.5
a = g * (1 + N1 ^ 2) / 2 / v ^ 2
b = -N1
c = y
X1 = (-b + Sqr(b ^ 2 - 4 * a * c)) / (2 * a)
'MsgBox X1

a = g * (1 + N2 ^ 2) / 2 / v ^ 2
b = -N2
c = y
X2 = (-b + Sqr(b ^ 2 - 4 * a * c)) / (2 * a)
'MsgBox X2

'N1 = Atn(N1)
t1 = X1 / v / Cos(N1)
'MsgBox t1

'N2 = Atn(N2)
t2 = X2 / v / Cos(N2)
'MsgBox t2


Dim f(99)
a = 0
b = 11
n = 88
h = (b - a) / n
'
For kk = 0 To n
x = a + kk * (b - a) / n
'f(kk) = Sqr(1 + (N1 - g * x * (1 + N1 ^ 2) / v ^ 2) ^ 2)
f(kk) = Sqr(1 + (N2 - g * x * (1 + N2 ^ 2) / v ^ 2) ^ 2)
Next kk
'
i2j = 0
For j = 1 To n / 2 - 1
i2j = i2j + f(2 * j)
Next j
'
i2jm1 = 0
For j = 1 To n / 2
i2jm1 = i2jm1 + f(2 * j - 1)
Next j
'
i = (f(0) + 2 * i2j + 4 * i2jm1 + f(n)) * h / 3
'
MsgBox i
d1 = Abs(i - 0.5)
'MsgBox d1
d2 = Abs(1 / (180 * n ^ 4))
'MsgBox d2
dd = Abs(d1 - d2)
'MsgBox dd