Multiply and simplify.
? 
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Use polar coordinates to find the limit of the function as (x, y) approaches (0, 0).f(x, y) = 
A. ? B. 0 C. 1 D. No limit
Mathematics
Find the value of the indicated trigonometric function of the angle ? in the figure. Give an exact answer with a rational denominator.
Find sec ?.
A. sec ? = 
B. sec ? = 
C. sec ? = 
D. sec ? = 
Mathematics
Graph the function.y = -cos ?x
A. 
B. 
C. 
D. 
Mathematics
Multiply using a special product formula.(a - 12)(a + 12)
A. a2 - 24a - 144 B. a2 - 144 C. a2 + 24a - 144 D. a2 - 24
Mathematics