Math Problem Statement
Find the reference angle for a rotation of start fraction, 2, pi, divided by, 9, end fraction92π.
Solution
To find the reference angle for a given rotation, we first need to determine whether the angle is already within the range to (or to radians) and then find the corresponding reference angle.
The given rotation angle is .
Step 1: Simplify the Angle
We want to reduce the angle within the standard interval of . To do this, we find the equivalent angle by subtracting multiples of .
Let's first divide by :
So, is approximately full rotations of .
Now, subtract the integer part (5 full rotations) to find the remaining portion of the angle: Now, multiply by to get the angle within one full revolution:
Step 2: Reference Angle
The simplified angle is . Since this angle is already between and , it is in the first quadrant, and therefore the reference angle is simply .
Thus, the reference angle is:
Would you like a further breakdown or any clarifications on this?
Here are 5 related questions for further exploration:
- How do you calculate the reference angle for angles greater than ?
- What is the relationship between reference angles and trigonometric function values?
- How can you convert radians to degrees for easier interpretation?
- What is the reference angle for ?
- How do negative angles affect the reference angle?
Tip: The reference angle is always positive and lies between and radians or and .
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Math Problem Analysis
Mathematical Concepts
Trigonometry
Angle Measures
Radian Measure
Reference Angle
Formulas
Reference angle formula: Angle - 2nπ (where n is the number of full rotations)
Multiplying fractions to simplify rotation: 0.11 × 2π
Theorems
Reference Angle Theorem
Modulus of an angle
Suitable Grade Level
Grades 10-12