In Exercises 21–28, an object moves in simple harmonic motion described by the given equation, where t is measured in seconds and d in inches. In each exercise, find the following: a. the maximum displacement b. the frequency c. the time required for one cycle. d = 1/3 sin 2t
Table of contents
- 0. Review of College Algebra4h 45m
- 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
4. Graphing Trigonometric Functions
Graphs of the Sine and Cosine Functions
Multiple Choice
Determine the value of y=−2⋅sin(−23π)+10 without using a calculator or the unit circle.

A
y=8
B
y=10
C
y=−2
D
y=12
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Verified step by step guidance1
Understand the problem: We need to evaluate the expression y = -2 * sin(-3π/2) + 10 without using a calculator or the unit circle.
Recall the property of the sine function: sin(-θ) = -sin(θ). This means that sin(-3π/2) = -sin(3π/2).
Determine the value of sin(3π/2): The angle 3π/2 corresponds to 270 degrees, which is on the negative y-axis. The sine of 270 degrees is -1.
Apply the property: Since sin(-3π/2) = -sin(3π/2), we have sin(-3π/2) = -(-1) = 1.
Substitute the value back into the expression: y = -2 * 1 + 10, which simplifies to y = -2 + 10.
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