Find the exact value of the sum.cos 75° - cos 15°
A. 
B. 
C. - 
D. 
Answer: C
Mathematics
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Verify the identity.
2 = 1 - sin x
What will be an ideal response?
Mathematics
Convert the angle to degrees, minutes, and seconds.252.24°
A. 252°23'24'' B. 252°15'23'' C. 252°14'24'' D. 252°14'24''
Mathematics
Solve the problem.A merchant has coffee worth $60 a pound that she wishes to mix with 50 pounds of coffee worth $90 a pound to get a mixture that can be sold for $70 a pound. How many pounds of the $60 coffee should be used?
A. 100 lb B. 150 lb C. 50 lb D. 75 lb
Mathematics
Perform the indicated operations and simplify the result. Leave the answer in factored form.
A. 
B. 
C. 
D. 
Mathematics