# Problem 13: # ns = 1:3 5 + 4*pi*ns / sqrt(15) # Problem 14: # t = 1 + ( 4/sqrt(15) ) * atan(sqrt(15)) r = 4/sqrt(15) y = r * exp( -0.25*(t-1) ) * sin( (t-1) / r ) gs = c( 1/2, 1/4 ) the_arg = sqrt( 4 - gs^2 )/gs the_coeff = 2/sqrt(4 - gs^2) ts = 1 + the_coeff * atan( the_arg ) ys = the_coeff * exp( -( gs/2 ) * ( ts - 1 ) ) * sin( ( sqrt( 4 - gs^2 ) / 2 ) * ( ts - 1 ) )