Find the exact value of the expression.cos-1 (-1)
A. 0
B. ?
C. 2?
D. 
Answer: B
Mathematics
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Evaluate the integral using the given substitution.
dx, u = 2x2
A. sin(2x2) + C
B. 
sin (u) + C
C. 
sin (2x2) + C
D. 
sin (2x2) + C
Mathematics
Use the order of operations to simplify the expression.
2? 
A. 
B. 
C. 
D. 
Mathematics
Find the product.(7x + 11y)(4x - 4y)
A. 28x2 + 16xy - 44y2 B. 28x2 - 28xy - 44y2 C. 28x2 + 44xy - 44y2 D. 28x2 + 16xy + 16y2
Mathematics
Perform the indicated operation. Simplify if possible.
+ 
A. 
B. 
C. 
D. 
Mathematics