Express the sum or difference as a product of sines and/or cosines.cos(2?) - cos(4?)
A. 2 sin(3?) sin ?
B. cos(-2?)
C. -2 cos(3?) sin ?
D. -2 sin(3?) sin ?
Answer: A
Mathematics
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Simplify the expression.j17
A. j B. -j C. -1 D. 1
Mathematics
You administer a 0.9% saline solution to a patient. Write this percent as an equivalent decimal number and as a reduced fraction.
A. 0.09; 
B. 0.0009; 
C. 0.9; 
D. 0.009; 
Mathematics
Solve the problem. Round to the nearest tenth, if necessary.If an object is propelled upward from a height of 80 feet at an initial velocity of 64 feet per second, then its height h after t seconds is given by the equation 
After how many seconds does the object hit the ground?
A. 4.0 sec B. 11 sec C. 2.5 sec D. 5 sec
Mathematics
Use a compass and straight edge to construct a 22.5° angle
What will be an ideal response?
Mathematics