cos
ω
t
=
sin
(
ω
t
+
π
/
2
)
cos
ω
t
=
sin
(
ω
t
+
π
/
2
)
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