Complete the identity.sin(5?) sin(8?) cos(5?) cos(8?) = ?

A.
B.
C. cos2(80?)
D.

Answer: D

Mathematics

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Solve the problem.At the beginning of the year, Jon was 59.3 inches tall. By the end of the year, he had grown 1.6 inches. What was his height at the end of the year?

A. 75.3 in. B. 60.9 in. C. 59.9 in. D. 61.0 in.

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Mathematics

Evaluate. -  

A. -  
B.  
C. -  
D.

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Mathematics

Scores in golf can be 0 (also called par), a positive integer (also called above par) or a negative integer (also called below par). Below are the scores of some members of a college golf team in a recent tournament. Find the average of the scores of the members shown.

A. 0 B. 2 C. -1 D. 1

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Mathematics

Provide an appropriate response.Rationalize the denominator and simplify: 

What will be an ideal response?

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Mathematics