Use a sum or difference identity to find the exact value.sin 185° cos 65° - cos 185° sin 65°
A. 
B. - 
C. - 
D. 
Answer: D
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Simplify the radical expression by factoring out the largest perfect nth power. Assume that all variables are positive.
A. 
B. y4 - 7
C. 
D. 7y4
Solve the problem.A bookcase is to be constructed as shown in the figure below. The height of the bookcase is 4 feet longer than the length of a shelf. If 26 feet of lumber are available for the entire unit (including the shelves, but NOT the back of the bookcase), what values are possible for the length of a shelf?
A. length ? 3 feet B. length ? 4.5 feet C. length ? 11.0 feet D. length ? 3 feet
Sketch the graph of the function and its inverse on the same coordinate axes.y = x3 + 1
A. 
B. 
C. 
D. 
The letters x and y represent rectangular coordinates. Write the equation using polar coordinates (r, ?).y = x
A. sin ? = cos ? B. r = sin ? C. sin ? = - cos ? D. r = cos ?