θ
4
5
t
r
i
g
f
u
n
c
t
i
o
n
s
c
o
m
p
l
e
m
e
n
t
a
r
y
l
a
b
e
l
s
ϕ
b
a
s
e
d
θ
d
4
5
.
0
0
ϕ
d
=
9
0
°
-
θ
d
4
5
.
0
0
θ
r
0
.
7
9
ϕ
r
=
π
/
2
-
θ
r
0
.
7
9
s
i
n
e
θ
0
.
7
1
s
i
n
e
ϕ
0
.
7
1
c
o
s
i
n
e
θ
0
.
7
1
c
o
s
i
n
e
ϕ
0
.
7
1
t
a
n
g
e
n
t
θ
1
.
0
0
t
a
n
g
e
n
t
ϕ
1
.
0
0
c
o
t
a
n
g
e
n
t
θ
1
.
0
0
c
o
t
a
n
g
e
n
t
ϕ
1
.
0
0
s
e
c
a
n
t
θ
1
.
4
1
s
e
c
a
n
t
ϕ
1
.
4
1
c
o
s
e
c
a
n
t
θ
1
.
4
1
c
o
s
e
c
a
n
t
ϕ
1
.
4
1
a
r
c
l
e
n
g
t
h
θ
0
.
7
9
c
o
a
r
c
l
e
n
g
t
h
ϕ
0
.
7
9
s
c
a
l
e
1