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Question 53
Given that sin(22.5∘)=2−22 \sin \left(22.5^{\circ}\right)=\frac{\sqrt{2-\sqrt{2}}}{2} sin(22.5∘)=22−2 , find an exact expression for tan22.5∘ \tan 22.5^{\circ} tan22.5∘ :
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