Assuming that the equations define x and y implicitly as differentiable functions 
find the slope of the curve 
at the given value of t.x cos t + x = 2t, y = t sin t + t, t = 
A. 2 + ?
B. 
C. 
D. 2
Answer: B
Mathematics
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A. 
B. 
C. 
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A. ?
B. {7}
C. 
D. {-7}
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