Use polar coordinates to find the limit of the function as (x, y) approaches (0, 0).f(x, y) = cos
A. 1
B. 
C. 0
D. No limit
Answer: D
Mathematics
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Solve the problem. Round to two decimal places if needed.Find the length of the arc intercepted by a central angle of ? = 60° in a circle of radius r = 4 feet.
A. 4.35 feet B. 4.4 feet C. 4.25 feet D. 4.19 feet
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Find the LCM by factoring.8, 20
A. 40 B. 20 C. 28 D. 160
Mathematics
Evaluate the expression without a calculator.log4 
A. 1/2 B. -2 C. 4 D. 8
Mathematics
Find the trigonometric function value of angle ?. Use a calculator if necessary.tan ? = 0.80978403, with ? in quadrant IFind sec ?.
A. 1.2867596 B. -1.3452821 C. -1.2867596 D. 1.3452821
Mathematics