Select the functions that have identical graphs.(i) y = cos x(ii) y = - sin (x - ?)(iii) y = cos 
A. i, ii and iii
B. i and iii
C. ii and iii
D. i and ii
Answer: C
Mathematics
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Write the expression in the form a + bi.
A. 
i
B. - 
C. - 
- 
i
D. - 
+ 
i
Mathematics
Between the pair of numbers, insert the appropriate sign: <, =, or >.5
5
A. < B. = C. >
Mathematics
Perform the indicated operation. 
+ 
A. 
B. - 
C. 
D. - 
Mathematics
Solve the linear system by using an inverse matrix.
A. {(1, 5, 9)} B. {(1, 9, 5)} C. {(-1, 9, 2)} D. ?
Mathematics