The sum of the series `S=sin 206^@ + sin 208^@ + sin 210^@ + ... ... + sin 1234^@` is

The sum of the series S=sin206^(@)+sin208^(@)+sin210^(@)+......+sin1234^(@) is

The sum of the series sum _(n=1) ^(oo) sin ((n!pi)/(720)) is

The sum of the series sum _(n=1) ^(oo) sin ((n!pi)/(720)) is .............. A) sin ((pi)/(180)) + sin ((pi)/(360)) + sin ((pi)/(540)) B) sin ((pi)/(6)) +sin ((pi)/(30)) + sin ((pi)/(120)) + sin ((pi)/(360)) C) sin ((pi)/(6)) + sin ((pi)/(30)) + sin ((pi)/(120)) + sin ((pi)/(360))+sin ((pi)/(720)) D) sin ((pi)/(180))+ sin ((pi)/(360))

The sum of the series underset(n=1)sum sin((nipi)/720) is

Find the value of sin 330^(@) .cos 120^(@) + cos 210^(@) . Sin 300^(@) .

Sum the series: sin alpha - sin 2alpha + sin 3alpha - sin 4alpha + ... to n terms.

If s_(n) ,be the sum of n terms of the series,sin x+sin2x+sin3x+......+sin nx then show that Lim it_(n rarr oo)(s_(1)+s_(2)+......+s_(n))/(n)=(1)/(2)cot((x)/(2))(x!=2k pi,k in I)

The sum 1/(sin 45^@sin 46^@) + 1/(sin 47^@sin 48^@)+1/( sin 49^@ sin 50^@)+........+1/(sin 133^@sin 134^@) is equal to

The sum 1/(sin 45^@sin 46^@) + 1/(sin 47^@sin 48^@)+1/( sin 49^@ sin 50^@)+........+1/(sin 133^@sin 134^@) is equal to

Find sin330^@.cos120^@+ cos210^@.sin300^@