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" Prove that "(cos^(2)48^(@)-sin^(2)12^(...

" Prove that "(cos^(2)48^(@)-sin^(2)12^(@))=((sqrt(5)+1))/(2)

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Prove that: cos^(2)48^(@)-sin^(2)12^(@)=(sqrt(5)+1)/(8)

Prove that: cos^(2)48^(@)-sin^(2)12^(@)=(sqrt(5)+1)/(8)

Prove that cos^(2)48^(@)-sin^(2)12^(@)=((sqrt5+1))/(8) .

Prove that: cos^(2)48^(0)-sin^(2)12^(0)=(sqrt(5)+1)/(8)

Prove that sin^(2)48^(@)-cos^(2)12^(@)=-(sqrt(5)+1)/(8)

Prove that sin^(2)48^(@)-cos^(2)12^(@)=-(sqrt(5)+1)/(8)

cos^(2)48^(0)-sin^(2)12^(0) is

cos ^(2) 48^(@) - sin ^(2) 12 ^(@) = (sqrt5+1)/(8).

Prove that cos^2 48^@-sin^2 12^@=((sqrt5+1))/8

Prove that: sin^(2)42^(2)-cos^(2)78^(@)=(sqrt(5)+1)/(8)