cos 2 + sin 2 = 1
tan =
cos 2 =
sin 2 = =
sin ( - ) = - sin
cos ( - ) = cos
tan ( - ) = - tan
sin ( + ) = - sin cos ( + ) = - cos tan ( + ) = tan |
sin ( + ) = cos cos ( + ) = - sin tan ( + ) = - cotan |
sin ( + ) = - cos cos ( + ) = sin tan ( + ) = - cotan |
sin ( - ) = sin cos ( - ) = - cos tan ( - ) = - tan |
sin ( - ) = cos cos ( - ) = sin tan ( - ) = cotan |
sin ( - ) = - cos cos ( - ) = - sin tan ( - ) = cotan |
cos ( + ) = - sin . sin + cos . cos sin ( + ) = sin . cos + cos . sin tan ( + ) = |
cos ( - ) = sin . sin + cos . cos sin ( - ) = sin . cos - cos . sin tan ( - ) = |
cos + cos = 2 . cos . cos cos - cos = - 2 . sin . sin sin + sin = 2 . sin . cos sin - sin = 2 . cos . sin |
cos . cos = sin . sin = sin . cos = tan . cos = tan . sin = |
tan =
cos 2 =
sin 2 =
tan 2 =
si t = tan
sin = cos = tan = |
sin ( 2 . ) = cos ( 2 . ) = tan ( 2 . ) = |
cos ( 2 . ) = cos 2 - sin 2 = 1 - 2 . sin 2 = 2 . cos 2 - 1
sin ( 2 . ) = 2 . sin . cos
tan ( 2 . ) =
cos ( 3 . ) = cos - 4 . cos . sin 2 = - 3 . cos + 4 . cos 3
sin ( 3 . ) = 3 . sin - 4 . sin 3
tan ( 3 . ) =
cos ( 4 . ) = 8 . cos 4 - 8 . cos 2 + 1 = 8 . sin 4 - 16 . sin 2 + 8 . sin + 1
sin ( 4 . ) = 4 . sin cos 3 - 4 . cos . sin 3
tan ( 4 . ) =
tan ( n . ) =
a . cos x + b . sin x = c . sin ( x + d )
avec c2 = a2 + b2
et tan d = a / b