Solve the equation sin(2x) = 1 for x in the interval [0, 2π].

Practice Questions

Q1
Solve the equation sin(2x) = 1 for x in the interval [0, 2π].
  1. π/4
  2. 3π/4
  3. π/2
  4. 5π/4

Questions & Step-by-Step Solutions

Solve the equation sin(2x) = 1 for x in the interval [0, 2π].
  • Step 1: Start with the equation sin(2x) = 1.
  • Step 2: Recall that the sine function equals 1 at specific angles. The general solution for sin(θ) = 1 is θ = π/2 + 2nπ, where n is any integer.
  • Step 3: Set 2x equal to π/2 + 2nπ: 2x = π/2 + 2nπ.
  • Step 4: Solve for x by dividing everything by 2: x = π/4 + nπ.
  • Step 5: Now, we need to find the values of x in the interval [0, 2π].
  • Step 6: Start with n = 0: x = π/4.
  • Step 7: Next, try n = 1: x = π/4 + π = 5π/4.
  • Step 8: Check if there are any more solutions by trying n = 2: x = π/4 + 2π, which is greater than 2π, so we stop here.
  • Step 9: The solutions in the interval [0, 2π] are π/4 and 5π/4.
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