Use the product-to-sum formulas to rewrite the expression as the sum or difference of two functions.sin 
? sin 
?
A. 
cos 
? - 
cos 
?
B. 
sin 
? - 
sin 
?
C. 
sin 
? + 
sin 
?
D. 
cos 
? + 
cos 
?
Answer: A
Mathematics
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A. 46 B. 2 C. 38 D. 26
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Find an equation for the ellipse.Vertices at (0, ±8); c = 4
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
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A. 85,849 B. 86,436 C. 85,264 D. 86,142
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