Solve the problem.What is the domain of the cosine function?
A. all real numbers, except odd multiples of 
(90°)
B. all real numbers from -1 to 1, inclusive
C. all real numbers, except integral multiples of ? (180°)
D. all real numbers
Answer: D
Mathematics
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Write interval notation.{x?0 < x < 4}
A. (0, 4) B. (0, 4] C. [0, 4] D. [0, 4)
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Use Gaussian elimination to solve the linear system by finding an equivalent system in triangular form.
A. (0, 3, 0) B. no solution C. (0, 3, -3) D. (0, 0, 3)
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Identify the like terms in the expression:
Mathematics
Provide an appropriate response.What is the 120th digit after the decimal point in the following repeating decimal? 0.
A. 0 B. 1 C. 6 D. 2
Mathematics