Cos 2 48 sin 2 12 5 1 8 July 8, 2019 16 32 64 128 Prove that cos 2 48 sin 2 12 sqrt 5 )+ 1 )/( 8 Cos 2 48 deg sin 2 12 deg sqrt 5 1 )/ 8 Cos2 48 - sin2 12
