Write the sum or difference as a product containing only sines and/or cosines.cos 
+ cos 
A. 2 sin(2?) sin 
B. 2 sin(2?) sin ?
C. 2 cos(2?) cos 
D. 2 cos(2?)
Answer: C
Mathematics
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Factor, if possible.9x2 - 39x - 30
A. 3(3x + 2)(x - 5) B. (3x + 2)(3x - 15) C. 3(3x - 2)(x + 5) D. (9x + 6)(x - 5)
Mathematics
The following table shows some function values.
1.9 3.5 7 8.20
0.43 0.39 0.32 0.30?
Which formula below fits these data?
?
A. 
B. ?
C. ?
D. ?
Mathematics
Find the extreme values of the function subject to the given constraint.
A. Maximum: 7 at 
minimum: -2 at 
B. Maximum: 4 at 
minimum: -2 at 
C. Maximum: 7 at 
minimum: -5 at 
D. Maximum: 4 at 
minimum: -5 at 
Mathematics
Subtract. Write the answer in lowest terms as a mixed number.
A. 6
B. 7
C. 7
D. 8
Mathematics