The Value of cos(2π/7)...... | JEE Main 2022 | Trigonometry

JEE MAIN 2022

27-06-2022 S1

Question

The value of $\cos \left(\frac{2 \pi}{7}\right)+\cos \left(\frac{4 \pi}{7}\right)+\cos \left(\frac{6 \pi}{7}\right)$ is equal to:

Select the correct option:

A

–1

B

-1/2

C

-1/3

D

-1/4

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

Question Tags

JEE Main

Mathematics

Easy

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