Solve.sin (cos-1 2x) + cos (sin-1 2x) = 1
A. x = 0
B. x = ± 
C. x = 1
D. x = ± 
Answer: D
Mathematics
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Find the value of the indicated variable for the values given.z = 
; determine ? when z = 1.3, x = 85 and ? = 3
A. 81.1 B. 79.1 C. 81.8 D. 80.8
Mathematics
Find the volume of the described solid.The solid lies between planes perpendicular to the x-axis at x = - 4 and x = 4. The cross sections perpendicular to the x-axis are semicircles whose diameters run from 
to 
A. 
?
B. 
?
C. 
?
D. 
?
Mathematics
Identify the greatest common factor.2a4b2 + 10a3b3
A. 2a2b3 B. 2a3b3 C. 2a2b2 D. 2a3b2
Mathematics
Which equation matches the given calculator-generated graph and description? Decide without using your calculator.
Circle; center (0, 0); radius 3
A. x2 + y2 = 9 B. x2 + y2 = 3 C. x2 + y2 = 1 D. x2 + y2 = -9
Mathematics