What is the value of cos0 + cos1 +cos2 +............+cos180?

• now make the series twice
  
  now add them as
  cos0+cos1+--------------------+cos180
  + cos180+cos179+----------------+cos0
  now the sum is treated as 2s
  now the total is equal to zero
  because cos 180 =0
  => 2s=0
  => s=0
  
  therefore the sum of series cos0+-------------+cos180=0
  
• 11 years agoHelpfull: Yes(8) No(1)
• 0 ans.
  since,s=n*(n+1)/2=cos180*(cos180+1)/2=-1*(-1+1)/2=0/2=0 ans.
• 11 years agoHelpfull: Yes(5) No(0)
• cos0=1; cos180=-1, similarly cos179=-cos1, cos178=-cos2;&so on
  so the result will be 0
• 9 years agoHelpfull: Yes(1) No(0)