Home
Class 12
MATHS
Prove that cos 36^(@) cos 72^(@) cos 108...

Prove that `cos 36^(@) cos 72^(@) cos 108^(@) cos 144^(@)=1//16`.

Promotional Banner

Similar Questions

Explore conceptually related problems

Prove that 4 cos 6^(@) cos 42 ^(@) cos 66^(@) cos 78^(@) = (1)/(4).

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

4 cos 12 ^(@) cos 48^(@) cos 72^(@) = cos 36 ^(@)

Prove that: cos20^(@)cos40^(@)cos80^(@)=1/8

Prove that cos12^(@)+cos84^(@)+cos132^(@)+cos156^(@)=-1/2

Prove that : cos 10^(@) + cos 110^(@) + cos 130^(@) = 0 .

Prove that sin 36^(@) + cos 36^(@) = sqrt(2) cos 9^(@)

Prove that cos6^@ . cos42^@. cos66^@ cos78^@= 1/16

Prove that: cos175^(@)+cos65^(@)+cos55^(@)=0

Prove that (sin18^(@))/(cos72^(@))=1