Find the derivative.y = (csc x + cot x)(csc x - cot x)
A. y ' = - csc x cot x
B. y ' = - csc2 x
C. y ' = 0
D. y ' = 1
Answer: C
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Provide an appropriate response.
Estimate the quotient by rounding the divisor and dividend to numbers with one nonzero digit. Find the exact value. 
A. 0.0075; 137.847 B. 0.0075; 0.007254 C. 133: 137.847 D. 150: 137.847
Solve the problem.Consider the following simplified digital photograph that has a 3 × 3 grid with four gray levels numbered from 0 to 3. It shows a letter Y in dark gray on a white background.
Let A be the 3 × 3 matrix that represents this figure digitally. Find the matrix which represents the negative image of the picture represented by A.
A. 
B. 
C. 
D. 
Find the product.-5 ? 4 ? 67 ? (-5)
A. -6700 B. 670 C. -335 D. 6700
Solve the equation by making a table of values. Use -3, -2, -1, 0, 1, 2, and 3 for the values of x in your table.1 - 2x = -3
A. 2 B. 1 C. -3 D. -2