Jenifermorales101
Jenifermorales101
11.08.2019 • 
Mathematics

Hey! sum was solved. now try it with multiply! find the value of
 \cos\left(\dfrac{\pi}{9}\right)\cdot \cos\left(\dfrac{3\pi}{9}\right)\cdot \cos\left(\dfrac{5\pi}{9}\right)\cdot \cos\left(\dfrac{7\pi}{9}\right)\cdot

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