Find the value of the indicated trigonometric function of the angle ? in the figure. Rationalize the denominator where necessary.
Find cos ?.
A. 
B. 
C. 
D. 
Answer: D
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Round your answers to three significant digits. ? A piece of 20 in. × 24 in. metal duct is a rectangular prism. If it is 5 ft long, what is the lateral surface area A? ?
A. A = 450 in. 2 B. A = 400 in. 2 C. A = 4,500 in. 2 D. A = 4,000 in. 2 E. A = 440 in. 2
Determine the amplitude and range of the function and sketch its graph.y = 3 sin x
A. amplitude: 3; range: [-3, 3]
B. amplitude: 3; range: [0, 3]
C. amplitude: 3; range: [-3, 3]
D. amplitude: 3; range: [0, 3]
Use a calculator to evaluate the expression to the nearest tenth of a degree, if necessary.
?
?
__________°
Fill in the blank(s) with the appropriate word(s).
Express the number in scientific notation.0.000174
A. 1.74 × 10-4 B. 1.74 × 104 C. 1.74 × 10-3 D. 1.74 × 10-5