Use the Pythagorean identity.Find cos ?, given that sin ? = 
and ? ? ? < 2?
A. - 
B. 
C. - 
D. 
Answer: A
Mathematics
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Find the equation of an ellipse that contains the following points.(-5, 0), (5, 0), (0, -8), and (0, 8)
A. 25x2 + 64y2 = 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics
Find ?y and f '(x) ?x for the given function.y = f(x) = 
, x = 5, and ?x = 0.05
A. 0.01118; 0.01118 B. 0.01115; 0.01118 C. 0.01115; 0.01115 D. 0.01115; 0.02236
Mathematics
?Find (AB) if 
and 
?
A. ?
B. ?
C. ?
D. ?
E. ?
Mathematics
Solve.A high school graduating class is made up of 325 students. There are 63 more girls than boys. How many boys are in the class?
A. 131 boys B. 63 boys C. 194 boys D. 325 boys
Mathematics