Decide whether or not the given equation is an identity.cos(x + y) cos(x - y) = cos2x - sin2y
A. Yes
B. No
Answer: A
Mathematics
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Solve.
= 
+ 
A. 3
B. -3
C. 
D. - 
Mathematics
Simplify the rational expression. If the expression is already in simplest form, state this as your answer.
A. 
B. 
C. 
D. simplest form
Mathematics
Add. Simplify, if possible.
+ 
A. 
B. 
C. 
D. 
Mathematics
Perform the indicated arithmetic.1
? 7
A. 11 B. 7 C. 5 D. 12
Mathematics