" 3."sin^(2)72^(@)-sin^(2)60^(@)=(sqrt(5)-1)/(8)

Prove that: sin^(2)(72^(@))-sin^(2)(60^(@))=(sqrt(5)-1)/(8)

Provet that: sin^(2)72^(2)-sin^(2)60^(2)=(sqrt(5)-1)/(8)

Prove that: sin^(2)24^(0)-sin^(2)6^(0)=(sqrt(5)-1)/(8)

Prove that: sin^(2)24^(0)-sin^(2)6^(0)=(sqrt(5)-1)/(8)

Prove that sin ^(2) 72 ^(@)- sin ^(2) 60 ^(@)= (sqrt5-1)/(8).

Prove that (i) "sin"^(2) 24^(@) - sin^(2) 6^(@) =((sqrt(5)-1))/(8) " "(ii) "sin"^(2) 72^(@) - cos^(2) 30^(@) =(sqrt(5)-1)/(8)

I : sin^(2) 42^(@) - sin^(2) 12^(@)=(sqrt(5)+1)/(8) II : 8 cos^(3) 10^(@) - 6 cos10^(@)= sqrt(3)

sin ^(2) 24 ^(@) - sin ^(2) 6^(@) = (sqrt5 -1)/(8).

Prove that : sin^2(72^@) - sin^2 (60^@) = (sqrt5 - 1)/8

Prove that : sin^2 72^@- sin^2 60^@= (sqrt5-1)/8 .