[" 4."32sin^(6)15^(0)-48sin^(4)15^(0)+18sin^(2)15^(0)=],[" 1) "11]

32sin^(6)15^(@)-48sin^(4)15^(@)+18sin^(2)15^(@)=

32sin^(6) 15^@ -48 sin^(4) 15 ^(@) + 18 sin^2 15^@ =

[sin^(2)5^(0)+sin^(2)10^(0)+sin^(2)15^(0)+...........],[+sin^(2)90^(0)=..........]

Evaluate :sin^(2)(15^(0)+A)-sin^(2)(15^(0)-A)

Show that sin^(2)5^(@)+sin^(2)10^(0)+sin^(2)15^(0)+...+sin^(2)90^(@)=9(1)/(2)

sin^(2)12^(0)+sin^(2)21^(0)+sin^(2)39^(0)+ sin^(2)48^(2)-sin^(2)9^(0)- sin^(2) 18^(0)=

sin ^ (2) (15 + A) -sin ^ (2) (15-A)

(sin ^ (2) 15 ^ (@) - cos ^ (2) 15 ^ (@)) / (sin ^ (2) 15 ^ (@) + cos ^ (2) 15 ^ (@))

Which of the following number(s) is/are rational? (a)sin 15^(0)(b)cos15^(0)(c)sin15^(0)cos15^(0)(d)sin15^(0)cos75^(0)