Find the general solution of the equation sin(x) = sin(π/4).

Practice Questions

Q1
Find the general solution of the equation sin(x) = sin(π/4).
  1. x = nπ + (-1)^n π/4
  2. x = nπ + π/4
  3. x = nπ + 3π/4
  4. x = nπ + π/2

Questions & Step-by-Step Solutions

Find the general solution of the equation sin(x) = sin(π/4).
Correct Answer: x = nπ + (-1)^n π/4
  • Step 1: Understand the equation sin(x) = sin(π/4). This means we are looking for all values of x where the sine of x equals the sine of π/4.
  • Step 2: Recall that sin(π/4) is a specific value. We know that sin(π/4) = √2/2.
  • Step 3: The sine function is periodic, meaning it repeats its values. The sine function equals a specific value at multiple angles.
  • Step 4: The general solutions for sin(x) = sin(a) can be expressed as x = nπ + (-1)^n a, where n is any integer and a is the angle we are comparing to (in this case, π/4).
  • Step 5: Substitute a with π/4 in the general solution formula: x = nπ + (-1)^n (π/4).
  • Step 6: This gives us the final general solution: x = nπ + (-1)^n π/4, where n is any integer.
  • Trigonometric Equations – The question tests the understanding of solving equations involving the sine function and finding general solutions.
  • Periodic Functions – It assesses knowledge of the periodic nature of the sine function and how to express solutions in terms of integer multiples of π.
  • General Solutions – The question evaluates the ability to derive general solutions that account for all possible angles that satisfy the equation.
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