Use a half-angle identity to find the exact value of sin 90°

Metatheoretic asked Sep 18, 2023

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Metatheoretic asked Sep 18, 2023

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19 votes

Answer:

Explanation:

$\sin (180^(\circ))/(2)=\sqrt{(1-\cos 180^(\circ))/(2)} \\ \\ \sin 90^(\circ)=\sqrt{(2)/(2)} \\ \\ =1$

Yevgenia answered Sep 24, 2023

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