`cos2 0^(@)+cos10 0^(@)+cos14 0^(@)=`

cos130^(@)+cos110^(@)+cos10^(@)=0

cos130^(@)+cos110^(@)+cos10^(@)=0

Prove that cos 2 0^(@)cos4 0^(@)cos6 0^(@)cos8 0^(@)=1/16

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

Show that cos 10^(@) + cos 110^(@) + cos 130^(@) = 0

Prove the following Identities cos 10^(@) + cos 110^(@) + cos 130^(@) = 0

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

cos4 0^(@)+cos2 0^(@))=3(cos1 0^(@)+sin2 0^(@)) 40 CUSOUcos 40^@ + cos 20O 4(cos310^@ + sin320^@) = 3(cos 10^@ + sin20^@)N3.1 = 4

Evaluate (2cos4 0^(@)-cos2 0^(@))/(sin2 0^(@)