Make the required change in the given equation. r2 - z2 = 1 to Cartesian coordinates
A. x2 + y2 - z2 = 1
B. x2 + y2 = 1
C. x2 + y2 = -1
D. x2 + y2 + z2 = 1
Answer: A
Mathematics
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A. 
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C. 3
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Express the function as a trigonometric function of x.sin 4x
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