Какие числа на координатной прямой расположены между числами -0, 001 и 0, 001 а)0, 0009 б)0 в)0, 002 г) -0, 01

Какие числа на координатной прямой расположены между числами -0,001 и 0,001а)0,0009б)0в)0,002г) -0,01 лежит число 0 остальные не входят в промежуток

1. i saw point to a picture on the wall.  2. we saw the children climb to the tops of the trees.  3. i noticed henry go up and spoke to the stranger.  4. i saw him slip and fall 5. i saw him open the door and leave the room.  6.  we watched them them turn the corner and disappeare.  7. the boy felt the doctor touch his leg.8. pete'e friends saw him buy some flowers.9. tamara saw the waves carry the boat away.  10. have you heard him sing the part of herman in tchaikovsky’s “queen of spades”?

Sin7x - cos13x = 0 sin7x - sin(π/2 - 13x) = 0 2 * sin0,5(7x - π/2 + 13x) * cos0,5(7x + π/2 - 13x) = 0 sin(10x - π/4) * cos(π/4 - 3x) = 0 sin(10x - π/4) = 0 или cos(π/4 - 3x) = 0 10х - π/4 = πn, n ∈ ℤ или π/4 - 3х = π/2 + πk, k ∈ ℤ отсюда находим х. sinx - sin3x + sin5x = 0 (sinx + sin5x) - sin3x = 0 2 * sin0,5(x + 5x) * cos0,5(x - 5x) - sin3x = 0 2 * sin3x * cos(-2x) - sin3x = 0 sin3x * (2 * cos2x - 1) = 0 sin3x = 0 или 2 * cos2x - 1 = 0 3x = πn, n ∈ ℤ или cos2x = 0,5 3x = πn, n ∈ ℤ или х = ±π/6 + πk, k ∈ ℤ sinx - sin2x + sin3x + sin4x = 0 (sinx + sin3x) + (sin4x - sin2x) = 0 2 * sin0,5(x + 3x) * cos0,5(x - 3x) + 2 * sin0,5(4x - 2x) * cos0,5(4x + 2x) = 0 sin2x * cos(-x) + sinx * cos3x = 0 2 * sinx * cos²x + sinx * cos3x = 0 sinx * (2cos²x + cos3x) = 0 sinx = 0 или 2cos²x + cos3x = 0 x = πn, n ∈ ℤ или 2cos²x + 4cos³x - 3cosx = 0 x = πn, n ∈ ℤ или cosx = 0 или 4cos²x + 2cosx - 3 = 0 x = πn, n ∈ ℤ или х = π/2 + πk, k ∈ ℤ или cosx = 0,25(-1 ± √13) 0,25(-1 - √13) по молулю превосходит единицу, значит cosx = 0,25(-1 + √13). x = ±arccos(-1 + √13) + 2πm, m ∈ ℤ.