Find the value of the indicated trigonometric function of the angle ? in the figure. Give an exact answer with a rational denominator.
Find cos ?.
A. cos ? = 
B. cos ? = 
C. cos ? = 
D. cos ? = 
Answer: B
Mathematics
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Solve the problem.The shape and density of a thin shell are indicated below. Find the coordinates of the center of mass.Shell: cone x2 + y2 - z2 = 0 between z = 1 and z = 2Density: constant
A. 
B. 
C. 
D. 
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Evaluate the improper integral.
A. 
B. 6
C. 
D. 1
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Solve the problem.An elementary school has 17 classrooms, each of which can take 30 children. How many children can the school accept for admission?
A. 510 B. 527 C. 520 D. 540
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Use Identities to find the exact value.cos 165°
A. 
B. 
C. 
D. 
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