Math Problem Statement
Find all values of x such that
sin(2x) = sin(x)
and
0 β€ x β€ 2π.
Solution
To find all values of such that within the interval , we will proceed by solving the equation.
Step 1: Use the identity for
We know that: So, the equation becomes:
Step 2: Factor the equation
We can factor the equation as: This equation is satisfied when either:
Step 3: Solve for from each factor
Case 1:
within at:
Case 2:
Solve for : within at:
Step 4: Combine all solutions
The values of that satisfy within the interval are:
Would you like to go over any of these steps in more detail?
Here are some related questions you might find helpful:
- How do you solve trigonometric equations involving multiple angles?
- What are the general solutions for and ?
- How can you use trigonometric identities to simplify equations?
- What other identities could be useful in solving trigonometric equations?
- How can you verify the solutions of trigonometric equations within a specific interval?
Tip: When solving trigonometric equations, always consider the interval given and ensure that all solutions lie within that interval.
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Math Problem Analysis
Mathematical Concepts
Trigonometry
Trigonometric Identities
Equations
Formulas
Double-angle identity for sine: sin(2x) = 2sin(x)cos(x)
Theorems
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Suitable Grade Level
Grades 11-12