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cos36^(@)...

cos36^(@)

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cos 36^(@) - cos 72^(@) =

cos(36^(@)-A)cos(36^(@)+A)+cos(54^(@)+A)cos(54^(@)-A)=

Show that cos 36^(@) cos 54 ^(@) -sin 36^(@) sin 54^(@) =0

Show that cos 36^(@) cos 54 ^(@) -sin 36^(@) sin 54^(@) =0

Show that cos 36^(@) cos 54 ^(@) -sin 36^(@) sin 54^(@) =0

Show that : cos 36^(@) cos 54^(@) - sin 36^(@) sin 54^(@) = 0 .

Show that cos 36^(@) cos 54 ^(@) -sin 36^(@) sin 54^(@) =0

Show that cos 36^(@) cos 54 ^(@) -sin 36^(@) sin 54^(@) =0

Find the value of cos 36^(@)

Find the value of cos 36^(@)