Rownanie trygonometryczne
mendox: 4sin2x − sinxcosx + 3cos2x = 3
4 lis 20:02
M:
5 mar 18:15
Mila:
3 cos
2x+3 sin
2x+sin
2x=3
3+sin
2x−sinxcosx=3
sin
2x−sinxcosx=0
sinx(sinx−cosx)=0
sinx=0 lub sinx=cosx,
| | sinx | | π | |
x=kπ lub |
| =1⇔x= |
| +kπ |
| | cosx | | 4 | |
5 mar 18:38