rownania trygonometryczne
Adamxd:
4 cze 14:08
ICSP: | | x | | x | | 1 | | 2x | |
sin4 |
| + cos4 |
| = 1 − |
| (sin |
| )2 |
| | 2 | | 2 | | 2 | | 3 | |
4 cze 14:16
Adamxd: skad ta jedna druga
4 cze 14:59
Eta:
sin
4(x/3)+cos
4(x/3)= [(sin
2(x/3)+cos
2(x/3)]
2 −2 sin
2(x/3)*cos
2(x/3)=
| | 1 | | 1 | |
=1 − |
| *4 sin2(x/3)*cos2(x/3)= 1 − |
| *sin2(2x/3) |
| | 2 | | 2 | |
4 cze 16:42