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) Find and equation of the tangent to the curve at the point corresponding to the given value of the parameter x= cos t + sin 2t, y= sin t + cos 2t...

1.) Find and equation of the tangent to the curve at the point corresponding to the given value of the  parameter
x= cos t + sin 2t, y= sin t + cos 2t  (t=0)
2.) Find dy/dx and d^2/dx^2 for  which values of t is the curve concave upward
x= t + ln t, y = 1 - ln t

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