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Question Number 166134 by amin96 last updated on 13/Feb/22

Answered by MJS_new last updated on 14/Feb/22

$$\mathrm{you}\mathrm{need}\mathrm{the}\mathrm{trigonometric}\mathrm{method}\mathrm{to}\mathrm{get}$$$$x_1=-\cos \frac{\pi }{9}$$$$x_2=\sin \frac{\pi }{18}$$$$x_3=\cos \frac{2\pi }{9}$$

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