Math, asked by sirishasirsha70, 6 hours ago

cosπ/7+cos2π/7+cos 3π/7+cos4π/7+cos5π/7+cos6π/7

Answers

Answered by meghana6963

0

Answer:

add everything ypu will get

$\cos(7pi \div 7)$

then

cos pi

cos 180° = -1

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