(1)
If x = et sin t, y = etcos t, t is a parameter, then dy/dx at (1, 1) is equal to
Answer: 0
Answer: 0
Answer: 0
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Answer: –x/y
Answer: (-1) (n – 1)!
Answer: -1
Answer: sec x tan x
Answer: sin2(a+y)/sina
Answer: 2
Answer: 0
Answer: discontinuous at only one point at x = 0
Answer: 1
Answer: −(ax+hy)/hx+by
Answer: 0
Answer: aex – be-x
Answer: -1
Answer: None of these
Answer: 1/3
Answer: None of these
Answer: 1
Answer: −y/(1+logx)2
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