cos22x+sin22x?2sin2xcos2x |
cos22x?sin22x |
=
(sin2x?cos2x)2 |
(cos2x+sin2x)(cos2x?sin2x) |
=
cos2x?sin2x |
sin2x+cos2x |
=
1?tan2x |
1+tan2x |
1?2sin2xcos2x |
cos22x?sin22x |
1?tan2x |
1+tan2x |
cos22x+sin22x?2sin2xcos2x |
cos22x?sin22x |
(sin2x?cos2x)2 |
(cos2x+sin2x)(cos2x?sin2x) |
cos2x?sin2x |
sin2x+cos2x |
1?tan2x |
1+tan2x |