number
of
subintervals
1
radius
based
on
midpoints
endpoints
random
show
exact
region
0
.
1
.
2
.
3
.
θ
=
α
θ
=
β
area
=
1
2
∫
β
α
f
(
θ
)
2
θ
≈
3
.
32954
approximation
=
3
.
33292
error
=
0
.
00338
