Find the exact value of the expression.cos 
cos 
+ sin 
sin 
A. 1
B. 
C. 
D. 
Answer: C
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Determine the symmetries of the curve.r2 = -9 cos 4?
A. x-axis, y-axis, origin B. No symmetry C. x-axis only D. Origin only
Evaluate the surface integral of the function g over the surface S.G(x,y,z) = x2 + y2 + z2; S is the surface of the cube formed from the coordinate planes and the planes 
and 
A. 135 B. 189 C. 567 D. 405
Solve the problem.The area of a parallelogram with sides a and b and the included angle ? can be found using the formula 
Determine the angle between the two sides if A = 37.5 in.2, a = 9.42 in., and b = 6.14 in.
A. 0.604 rad B. 0.011 rad C. 0.648 rad D. 0.705 rad
Solve the indicated systems of equations graphically.A helicopter is located 8.6 mi south of west of a radio tower such that it is four times as far south as it is west from the tower. Find the southern and western components of the displacement from the tower.
A. 2.0 mi S, 0.5 mi W B. 2.1 mi S, 8.3 mi W C. 8.3 mi S, 0.8 mi W D. 2.0 mi S, 0.4 mi W