Consider the linear transformation T : R → R° given by x1 + x2 cos(27/3) + x3 cos(47/3) 1 x1 + x2 cos(47/3) + x3 cos(87/3) 3 T = - | ¤1+x2 C0s(67/3) + x3 cos(127/3). (a) Find the standard matrix of T. (b) Decide if T is one-to-one. (c) Decide if T is onto. (d) Is T invertible?

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