(i) To express \(24 \sin \theta - 7 \cos \theta\) in the form \(R \sin(\theta - \alpha)\), we use the identity:
\(\begin{aligned} a \sin \theta + b \cos \theta &\equiv R \sin(\theta + \alpha), \\ R &= \sqrt{a^2 + b^2}, \\ \tan \alpha &= \frac{b}{a}. \end{aligned}\)
Here, \(a = 24\) and \(b = -7\). Thus,
\(R = \sqrt{24^2 + (-7)^2} = \sqrt{576 + 49} = \sqrt{625} = 25.\)
\(\tan \alpha = \frac{-7}{24}.\)
\(\alpha = \tan^{-1}\left(\frac{-7}{24}\right)\), which gives \(\alpha \approx 16.26^\circ\) (to 2 decimal places).
(ii) To find the smallest positive value of \(\theta\) satisfying \(24 \sin \theta - 7 \cos \theta = 17\), we use:
\(R \sin(\theta - \alpha) = 17.\)
\(25 \sin(\theta - 16.26^\circ) = 17.\)
\(\sin(\theta - 16.26^\circ) = \frac{17}{25}.\)
\(\theta - 16.26^\circ = \sin^{-1}\left(\frac{17}{25}\right)\).
\(\sin^{-1}\left(\frac{17}{25}\right) \approx 42.84^\circ\).
\(\theta = 42.84^\circ + 16.26^\circ = 59.1^\circ\).