Home
Class 11
MATHS
सिद्ध कीजिए की cos 100^@ + cos 20^@ = co...

सिद्ध कीजिए की `cos 100^@ + cos 20^@ = cos 40^@`

Promotional Banner

Similar Questions

Explore conceptually related problems

cos 20^(@) cos 40^(@) cos 80^(@)=

cos 20^(@) + cos 100^(@) + cos 140^(@) =

Prove that: cos 100^0+cos 20^0=cos 40^0

cos20^@cos40^@cos80^@=

cos 20^(@) + cos 100^(@) + cos 140^(@) = 0

4 (cos ^(3) 20^(@) + cos ^(3) 40^(@)) = 3 ( cos 20 ^(@) + cos 40^(@))

Prove that cos 20^@ cos 40^@ cos 80^(@)=1/8 .

the value of cos 20^@ + cos 100^@ + cos 140 ^@ is equal to

cos 20^(@) + cos 100^(@) + cos 140^(@)= A) cos 130^(@) B) cos 45 ^(@) C)0D)none of these