[" 22.If "x=k(theta+sin theta)" and "y=k...

[" 22.If "x=k(theta+sin theta)" and "y=k(1+cos],[" theta),then what is the derivative of y with "],[" respect to "x" at "theta=pi/2" ? "],[" (a) "-1" (b) "0" (c) "1" (d) "2]

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