Значение функции - это Y.
Следовательно, Y = 2 * 3 - 3 = 3.
Ответ: 3
Будет 5 корень из 32768 = 8
<span>1. tg2x • ctg2x = 1
2. cos²x - 1 = - Sin</span>²x<span>
3. - sin²2x - cos²2x = -1
4. cos3x sin3x = 1/2*Sin6x
5. sinx/2 cosx/2 =1/2*Sinx
6. 1 - 2sin²4x =Cos8x
7. sin²3x = =?
8. cosx cos5x + sinx sin5x =Сos4x
9. cos6x sin8x - sin6x cos8x =Sin2x
10. 1 + cos5x =Cos</span>π/2 + Cos5x = 2Cos(π/4 +2,5x)Cos(π/4 -2,5x)<span>
11. sin4x - sin8x = -2Sin2xCos6x
12. cos3x + cos7x =2Cos5xCos2x
13. sin3x • sin5x= 1/2*(Cos2x- Cos8x)
14. cos (П/2-ã) =Sin</span>α<span>
15. tg (2П - ß) = -tg</span>β<span>
16. sin²12° + cos²12° =1
17. 2sin45° cos45° =Sin90</span>°<span> = 1
18. cos²55°/sin²55° =Ctg</span>²55°<span>
19. 2tg²12° ctg²12° =2
20. cos²26° - sin²26° = Cos52</span>°<span>
21. sin²35° - cos²35° = -Cos70</span>°<span>
22. 2cos²26° - 1 =Cos52</span>°<span>
23. - 2sin²57° = ?
24. cos 25° cos35° - sin25° sin35° =Cos60</span>°= 1/2<span>
25. sin49° cos4° - cos49° sin4° =Sin45</span>°<span> = </span>√2/2<span>
26. sin15° + sin25° =2Sin20</span>°<span>Cos5</span>°<span>
27. cos46° - cos22° = - 2Sin34</span>°<span> Sin12</span>°<span>
28. sin35° cos35° = 1/2*Sin70</span>°<span>
29. sin36° cos36° =1/2Sin72</span>°<span>
30. 1 - cos68° =Cos0 - Cos68</span>° = -2Sin34°Sin34° = -2Sin²34°
На ноль делить нельзя. Поэтому:
б) x+1+1/4x=0,
4x не равен 0 , x не равен 0,
D(f)=(-бесконечность,0)(0,плюс бесконечность)
в)x2+18/x-1-4=5
x-1 не равен 0,x не равен 1,
(-бесконечность,1)(1,+бесконечность)