Simplify the expression.
+ 
A. tan x
B. cot 2 x
C. sin x
D. cot x
Answer: D
Mathematics
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Determine the letters or numbers.Write the binary code for the letter R.
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A. 10,400 m B. 1.04 m C. 1040 m D. 10.4 m
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The mass of the part of a metal rod that lies between its left end and a point x meters to the right is 
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Mathematics