Fill in the blank using the word product, sum, quotient, or difference.The formula sin ? sin ? = 
[cos (? - ?) - cos (? + ?)] can be used to change a 
of two sines into the 
of two cosine expressions.
A. product, sum
B. quotient, sum
C. product, difference
D. quotient, difference
Answer: C
Mathematics
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A. 
B. 
C. 
D. 
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Write the rational expression as an equivalent expression with the indicated denominator.
= 
A. 
B. 
C. 
D. 
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Provide an appropriate response.Decide if the system has one solution, no solution, or an infinite number of solutions. x + y = 5 x + y = 2
A. One Solution B. Infinite number of solutions C. No Solution
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A. 
B. 
C. 
D. 
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