Value of ` 1/(sin 1^o sin 2^o) + 1/ (sin 2^o sin 3^o) +........+ 1/(sin 89^o sin 90^o)`is equal to

Value of (1)/(sin1^(o)sin2^(o))+(1)/(sin2^(o)sin3^(o))+......+(1)/(sin89^(@)sin90^(@)) is equal to

(1)/(sin1^(@)sin2^(@))+(1)/(sin2^(@)sin3^(@))......+(1)/(sin89^(@) sin90^(@))

Show that sin12^o sin48^o sin54^o =1/8 .

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

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

Show that sin20^o sin40^o sin60^o sin80^o =3/16

sin15^o +cos15^o is:

The value of sin^(2)1^(@)+sin^(2)2^(@)+sin^(2)3^(@)+....+sin^(2)88^(@)+sin^(2)89^(@) is equal to

Find the value of (sec 15^o/(cosec 75^o)) + (sin 72^o/cos 18^o) - (tan 33^o/cot 57^o)

1/(cos80^o) -sqrt3/(sin80^o ) =