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9-70.
  1. Convert the following pairs of parametric equations into rectangular form (in terms of x and y). Homework Help ✎

    1. x = cos t and y = sin t

    2. x = cos(2t) and y = sin(2t)

    3. x = t4 − 3t2 and y = t2

sin2(x) + cos2(x) = 1