| cos2x − sin22x | π | π | |||
≥ sin(x + | )*sin(x − | ) | |||
| 4cos2x | 6 | 6 |
| π | π | |||
sin(x + | )*sin(x − | ) = | ||
| 6 | 6 |
| π | π | 1 | 1 | 1 | ||||||
(sinx + sin | )(sinx − sin | ) = (sinx + | )(sinx − | ) = sin2x − | ||||||
| 6 | 6 | 2 | 2 | 4 |
| cos2x − sin22x | 1 | ||
≥ sin2x − | i co dalej z tym zrobić? wgl dobrze tak jest? | ||
| 4cos2x | 4 |