Determine the size of matrix A and tell whether it is a square matrix, row matrix, column matrix, or none of these.A = 
A. 3; row matrix
B. 3 × 2; none of these
C. 2 × 3; none of these
D. 6; row matrix
Answer: C
Mathematics
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Triangle ABC is a right triangle with sides of lengths a, b, and c and a right angle at C. Find the indicated trigonometric function value of A. Rationalize denominators containing radicals.a = 3, c = 4; find cot A.
A. 
B. 
C. 
D. 
Mathematics
Simplify.i24
A. -1 B. i C. -i D. 1
Mathematics
Add or subtract.7
- 4
+ 9
+ 2
A. 16
- 2
B. 16
- 2
C. 14
D. 16
- 2
Mathematics
Evaluate the expression.(94)
A. 2 B. 126 C. 63 D. 15,120
Mathematics