=
2
[
1
−
cos
2
N
δ
]
=
4
sin
2
N
δ
=
2
[
1
−
cos
2
N
δ
]
=
4
sin
2
N
δ
Close
Log in
Books
Repository
eAnswer
ePortfolio
Close
Log in
Books
Repository
eAnswer
ePortfolio
Log in
New user
OK
Error
Forgot?
Log in
Register
Recover
OK
Error
Change