(a) Given that $\sin \alpha =0.3907$, use tables to find the value of : (i) $\tan \alpha$ ; (ii) $\cos \alpha$.
(b) A ladder of length 4.5m leans against a vertical wall making an angle of 50° with the horizontal ground. If the bottom of a window is 4m above the ground, what is the distance between the top of the ladder and the bottom of the window? (Answer correct to the nearest cm)


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