Home
Class 12
MATHS
The value of cos((2pi)/7)+cos((4pi)/7)+c...

The value of `cos((2pi)/7)+cos((4pi)/7)+cos((6pi)/7)` is equal to :

A

`-1`

B

`-1/2`

C

`-1/3`

D

`-1/4`

Text Solution

AI Generated Solution

Promotional Banner

Topper's Solved these Questions

  • JEE MAINS 2022

    JEE MAINS PREVIOUS YEAR|Exercise Mathematics-Section B|50 Videos

  • JEE MAINS 2022

    JEE MAINS PREVIOUS YEAR|Exercise MATHEMATICS (SECTION A)|20 Videos

  • JEE MAINS 2021

    JEE MAINS PREVIOUS YEAR|Exercise Mathematics (Section A )|20 Videos

  • JEE MAINS 2023 JAN ACTUAL PAPER

    JEE MAINS PREVIOUS YEAR|Exercise Question|360 Videos

Similar Questions

Explore conceptually related problems

the value of (cos pi)/(7)cos(2(pi)/(7))cos(3(pi)/(7)) is

Prove that cos((2pi)/7) cos((4pi)/7) cos((8pi)/7) =1/8

Find the value of cos(2 pi)/(7)+cos(4 pi)/(7)+cos(6 pi)/(7)

Prove that cos((2pi)/7)cos((4pi)/7)cos((8pi)/7)=1/8

If the value of cos((2 pi)/(7))+cos((4 pi)/(7))+cos((6 pi)/(7))+cos((7(pi)/(7)))=-(l)/(2) Find the value of l

1+cos((2 pi)/(7))+cos((4 pi)/(7))+cos((6 pi)/(7)) is equal to (i)-(1)/(2)(ii)0( iii) (1)/(2)(iv)(3)/(2)

Let the exact value of cos((pi)/(7))+cos^(2)((pi)/(7))-2cos^(3)((pi)/(7)) is a rational number in the form (p)/(q), where p and q are integers.Find (p+q)

Find the value of (cos(2 pi))/(7)(cos(4 pi))/(7)(cos(6 pi))/(7)

The value of cos((pi)/(7))+cos((2 pi)/(7))+cos((3 pi)/(7))+cos((4 pi)/(7))+cos((5 pi)/(7))+cos((6 pi)/(7))+cos((7 pi)/(7)) is 1(b)-1(c)0(d) none of these