Prove that: `sin^2 12^@ +sin^2 21^@+sin^2 39^@+sin^2 48^@=1+sin^2 9^@+sin^2 18^@`

The value of sin^2 1^@ + sin^2 3^@ + sin^2 5^@ +…+ sin^2 87^@ + sin^2 89^@ is

Prove that sin 12^(@) sin18^(@)sin42^(@) sin48^(@) sin 72^(@) sin78^(@)=(cos18^(@))/(32) .

Prove that: sin12^(@)sin48^(@)sin54^(@)=1/8

Prove that sin^(2) 12^circ + sin^(2)21^circ + sin^(2)39^circ + sin^(2)48^circ = 1 + sin^(2)9^circ + sin^(2)18^circ

If A+B+C = 180^0 , Prove that : sin^2 (A/2) + sin^2 (B/2) + sin^2 (C/2) =1-2 sin (A/2) sin (B/2) sin (C/2)

Prove that: sin^(2)6x-sin^(2)4x=sin2x sin10x

The value of sin^(2) 1^(@) + sin^(2) 2^(@) + sin^(2) 3^(@)+ . . . . + sin^(2) 89^(@) + sin ^(2) 90^(@) is

The value of sin^(2)12^(0)+sin^(2)21^(0)+sin^(2)39^(0)+sin^(2)48^(0)-sin^(2)9^(0)-sin^(2)18^(0)

What is the value of the sin^(2) 6^(@) + sin^(2) 12^(@) + sin^(2) 18^(@) + "……" + sin^(2) 84^(@) + sin^(2) 90^(@) ?

The value of the expression sin^(2)1^(@)+sin^(2)11^(@)+sin^(2)21^(@)+ sin^(2)31^(@)+sin^(2)41^(@)+sin^(2)45^(@)+ sin^(2)49^(@)+sin^(2)59^(@)+sin^(2)69^(@)+ sin^(2)79^(@)+sin^(2)89^(@) is :