(a) Solve the equation on the given interval, expressing the solution for x in terms of inverse trigonometric functions. (Enter your answers as a comma-separated list.) 10(cos x)? - 9 cos x – 1 = 0 on [7/2, 1] X = (b) Use a calculator to approximate the solution in part (a) to three decimal places. (Enter your answers as a comma-separated list.)

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A:

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A:

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A: Let's find.

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A: we have given equation