WOLFRAM
|
DEMONSTRATIONS PROJECT
Duck Cut
z
e
n
i
t
h
ϕ
a
z
i
m
u
t
h
θ
P
l
o
t
t
h
e
d
u
c
k
u
s
i
n
g
s
p
h
e
r
i
c
a
l
c
o
o
r
d
i
n
a
t
e
s
r
=
l
n
(
ϕ
)
+
s
i
n
(
θ
)
w
i
t
h
b
o
t
h
ϕ
a
n
d
θ
r
a
n
g
i
n
g
f
r
o
m
0
t
o
2
π
.
