Multiply. Express the product in lowest terms.
? 
A. 
B. 
C. 
D. 
Answer: B
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Find the exact value of the expression.cos 
sin 
- cos 
sin 
A. 
B. 
C. 
D. 1
Solve the problem.In general, cos 2? ? 2 cos ?. Determine graphically whether there are any values of ? on 
for which 
If there are any such values, estimate them from your graph and refine your estimate numerically to the nearest tenth of a degree.
A. 90.0° and 270.0° B. None C. 111.5° and 248.5° D. 109.5° and 246.5°
Solve the equation. Round to the nearest thousandth.3(3x - 3) = 24
A. {1.693} B. {3.667} C. {-0.036} D. {1.964}
Solve the problem. Write the answer in lowest terms.Mr. Howard installed 
-inch roofing shingles on top of a 
thick tar paper. What was the combined thickness of the two layers of materials?
A. 
inch
B. 
inch
C. 
inch
D. 
inch