Establish the identity.
= cos(3?)
What will be an ideal response?
= 
= cos (3?)
Mathematics
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Rationalize the denominator. Assume all variables represent positive numbers. 
A. 
B. 
C. 
D. 
Mathematics
Divide.
A. 
+ 
i
B. 
- 
i
C. - 
- 
i
D. - 
+ 
i
Mathematics
Simplify the expression. Assume that all variables are non-negative.
A. x - 16
B. (x - 1)5
C. (x - 1)5
D. (x - 1)4
Mathematics
Solve the problem.The following table shows the number of resistors, in thousands, produced by Allied Electronics in 3 recent years. 
Fit a quadratic function f(x) = ax2 + bx + c to the data. What is the value of b?
A. 12 B. 10 C. 11 D. 9
Mathematics