(a) If \(9 \cos x - 7 = 1\) and \(0° \leq x \leq 90°\), find x. (b) Given that x is an integer, find the three greatest values of x which satisfy the inequa...

(a) If \(9 \cos x - 7 = 1\) and \(0° \leq x \leq 90°\), find x.

(b) Given that x is an integer, find the three greatest values of x which satisfy the inequality \(7x < 2x - 13\).

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