Decide whether the composite functions, f ? g and g ? f, are equal to x.f(x) = 
, g(x) = x2
A. Yes, yes
B. No, yes
C. No, no
D. Yes, no
Answer: C
Mathematics
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Simplify.
+ 
+ 
A. 
B. 
C. 
D. 
Mathematics
Express the sum or difference as a product of sines and/or cosines.cos(6?) + cos(4?)
A. 2 cos(5?) cos ? B. 2 cos(5?) sin ? C. 2 sin(5?) sin ? D. 2 cos(5?)
Mathematics
Multiply by powers of 10.3.8 × 100
A. 3800 B. 380 C. 0.038 D. 3.80000
Mathematics
Find the angle 
(in radians and degrees) between the lines. Round your answer to four decimal places for radians and round your answer to one decimal places for degree.
?
?
A. 
B. 
C. 
D. 
E. 
Mathematics