सिद्ध कीजिए कि cos A + cos ( 120^(@)...

सिद्ध कीजिए कि
` cos A + cos ( 120^(@) + A) + cos ( 120^(@) - A) = 0 `

A

0

B

3

C

5

D

`(2)/(3)`

Verified by Experts

The correct Answer is:

A

सिद्ध कीजिए कि cos A + cos ( 120^(@) + A) + cos ( 120^(@) - A) = ...
Text Solution
|
cos alpha+cos(120^(@)+alpha)+cos(120^(@)-alpha)=0
Text Solution
|
cos A + cos (120 ^ (@) + A) + cos (120 ^ (@) - A) =
Text Solution
|
" cos x + cos " (120^(@) -x ) + " cos "(120^(@) +x)=0
Text Solution
|
सिद्ध कीजिए कि cos A + cos ( 120^(@) + A) + cos ( 120^(@) - A) = ...
Text Solution
|
cosA+cos(120^(@)-A)+cos(120^(@)+A)=0
Text Solution
|
cosA+cos(120^(@)-A)+cos(120^(@)+A)=0
Text Solution
|
A : cos^(3) x + cos^(3)(120^@ + x) + cos^(3)(120^(@) - x)=(3)/(4) cos...
Text Solution
|
सिद्ध कीजिए की cos A + cos( 120 ^(@) +A) +cos ( 120^(@) -A) =0
Text Solution
|