Table of contents
- 0. Fundamental Concepts of Algebra3h 29m
- 1. Equations and Inequalities3h 27m
- 2. Graphs1h 43m
- 3. Functions & Graphs2h 17m
- 4. Polynomial Functions1h 54m
- 5. Rational Functions1h 23m
- 6. Exponential and Logarithmic Functions2h 28m
- 7. Measuring Angles40m
- 8. Trigonometric Functions on Right Triangles2h 5m
- 9. Unit Circle1h 19m
- 10. Graphing Trigonometric Functions1h 19m
- 11. Inverse Trigonometric Functions and Basic Trig Equations1h 41m
- 12. Trigonometric Identities 2h 34m
- 13. Non-Right Triangles1h 38m
- 14. Vectors2h 25m
- 15. Polar Equations2h 5m
- 16. Parametric Equations1h 6m
- 17. Graphing Complex Numbers1h 7m
- 18. Systems of Equations and Matrices3h 6m
- 19. Conic Sections2h 36m
- 20. Sequences, Series & Induction1h 15m
- 21. Combinatorics and Probability1h 45m
- 22. Limits & Continuity1h 49m
- 23. Intro to Derivatives & Area Under the Curve2h 9m
8. Trigonometric Functions on Right Triangles
Trigonometric Functions on Right Triangles
Struggling with Precalculus?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
What is a positive value of A in the interval [0°,90°) that will make the following statement true? Express the answer in four decimal places.
sinA=0.9235
A
22.5568°
B
67.4432°
C
22.4432°
D
33.5438°

1
Understand that the problem is asking for an angle A in the interval [0°, 90°) such that sin(A) = 0.9235.
Recall that the sine function is positive in the first quadrant, which is the interval [0°, 90°).
Use the inverse sine function, also known as arcsin, to find the angle A. This is done by calculating A = arcsin(0.9235).
Ensure that the calculator is set to degree mode since the problem specifies the angle in degrees.
After calculating, verify that the resulting angle is within the specified interval [0°, 90°) and round the answer to four decimal places.
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