Given that angle 2 has measure and angle 3 has measure , find the value of such that .
Table of contents
- 0. Review of College Algebra4h 43m
- 1. Measuring Angles40m
- 2. Trigonometric Functions on Right Triangles2h 5m
- 3. Unit Circle1h 19m
- 4. Graphing Trigonometric Functions1h 19m
- 5. Inverse Trigonometric Functions and Basic Trigonometric Equations1h 41m
- 6. Trigonometric Identities and More Equations2h 34m
- 7. Non-Right Triangles1h 38m
- 8. Vectors2h 25m
- 9. Polar Equations2h 5m
- 10. Parametric Equations1h 6m
- 11. Graphing Complex Numbers1h 7m
- OLD 1. Angles and the Trigonometric Functions Coming soon
- OLD 2. Trigonometric Functions graphs, Inverse Trigonometric Functions Coming soon
- OLD 3. Trigonometric Identities and Equations Coming soon
- OLD 4. Laws of Sines, Cosines and Vectors Coming soon
- OLD 5. Complex Numbers, Polar Coordinates and Parametric Equations Coming soon
- NEW (not used) 7. Laws of Sines, Cosines and Vectors Coming soon
- NEW (not used) 8. Vectors Coming soon
- NEW(not used) 9. Polar equations Coming soon
- NEW (not used) 11. Graphing Complex Numbers Coming soon
1. Measuring Angles
Angles in Standard Position
Multiple Choice
If is in standard position and its terminal side passes through the point , what is the degree measure of rounded to the nearest whole number?
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B
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Verified step by step guidance1
Identify the angle \( \theta \) in standard position whose terminal side passes through the point \( (2, 3) \). This means the point lies on the terminal side of the angle measured from the positive x-axis.
Calculate the reference angle by finding the arctangent of the ratio of the y-coordinate to the x-coordinate of the point. Use the formula:
\[ \theta = \tan^{-1} \left( \frac{y}{x} \right) = \tan^{-1} \left( \frac{3}{2} \right) \]
Evaluate the arctangent expression to find the angle in degrees. This will give the measure of the angle \( \theta \) in the first quadrant since both x and y are positive.
Round the resulting angle to the nearest whole number to get the degree measure of \( \theta \).
Verify that the angle is in the correct quadrant based on the signs of x and y. Since both are positive, the angle is indeed in the first quadrant, so no further adjustment is needed.
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