Show the number is natural sin (a sin 1/2)+sin (a cos sqrt(3)/2) Posted on April 19, 2017 by admin Show the number is natural sin (a sin 1/2)+sin (a cos sqrt(3)/2) Show the number is natural sin (a sin 1/2)+sin (a cos sqrt(3)/2) Show the number is natural sin (a sin 1/2)+sin (a cos sqrt(3)/2)