1 / | | 1 | 1*------ dy | 2 | 1 + y | / 0
/ | | 1 | 1*1*------ dy | 2 | 1 + y | /
1 1 1*------ = ----------------- 2 / 2 \ 1 + y 1*\(-y + 0) + 1/
/ | | 1 | 1*1*------ dy | 2 = | 1 + y | /
/ | | 1 | ------------- dy | 2 | (-y + 0) + 1 | /
/ | | 1 | ------------- dy | 2 | (-y + 0) + 1 | /
v = -y
/ | | 1 | ------ dv = atan(v) | 2 | 1 + v | /
/ | | 1 | ------------- dy = atan(y) | 2 | (-y + 0) + 1 | /
C + atan(y)
0.785398163397448
/ | | 1 | 1*------ dy = C + atan(y) | 2 | 1 + y | /