Evaluate (if possible) the sine, cosine, and tangent of the real number.
?
?
A. 
corresponds to the point 
.
B.
corresponds to the point 
.
C.
corresponds to the point 
.
D.
corresponds to the point 
.
E. Not possible
Answer: C
Mathematics
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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
Where 
, 
, and 
, find 
.
What will be an ideal response?
Mathematics
The position vector of a particle is r(t). Find the requested vector.The velocity at t = 
for r(t) = 4 sec2(t)i - 6tan(t)j + 1t2k
A. v
= 16i + 12j - 
?k
B. v
= -12j + 
?k
C. v
= -12j - 
?k
D. v
= 16i - 12j + 
?k
Mathematics
Find 
and 
.f(x, y) = ln yx
A. 
= 0; 
= - 
B. 
= ln y; 
= 
C. 
= xln y; 
= - 
D. 
= ln y; 
= - xln y
Mathematics