Express the sum or difference as a product of sines and/or cosines.sin 
+ sin 
A. 2 cos(9?) sin ?
B. 2 sin 
sin ?
C. 2 sin(9?)
D. 2 sin 
cos ?
Answer: D
Mathematics
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Shade the regions representing the set.C' ? (A ? B) 
A. 
B. 
C. 
D. 
Mathematics
Use a calculator to find the value of the expression rounded to two decimal places.cos-1 
A. 151.87 B. -61.87 C. 2.65 D. -1.08
Mathematics
Find the exact value of the expression without using a calculator.
A. -2
B. - 
C. - 
D. - 
Mathematics
Identify whether the number described is a parameter or a statistic.The average height of American women is 63.8".
A. Parameter B. Statistic
Mathematics