- The point P(0.5,0) lies on the curve y = cos (Tx). (a) If Q is the point (x, cos (Tx)), use your calculator to find the slope of the secant line PQ (correct to six decimal places) for the following values of a: i. 0 ii. 0.4 iii. 0.49 iv. 0.499 v. 1 vi. 0.6 vii. 0.51 viii. 0.501

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