Use identities to simplify the expression.sin4 w - cos4 w + cos2 w
A. sin2 w
B. 0
C. cos2 w
D. 1
Answer: A
Mathematics
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Find 
and 
.f(x, y) = xye-y
A. 
= ye-y; 
= xe-y(y - 1)
B. 
= ye-y; 
= xe-y
C. 
= ye-y; 
= xe-y(1 - y)
D. 
= ye-y; 
= - xye-y
Mathematics
Find the average velocity of an object which follows the position function s(t) over the given interval.s(t) = 3 + tan t, 
A. 0
B. 
C. - 
D. - 
Mathematics
Write in terms of i.
A. 5
B. -5
C. 5i
D. -5i
Mathematics
Solve for x.
= -16
A. 7 B. -7 C. -6 D. 6
Mathematics