Values of trigonometric functions of arcs pi/6 pi/4 and p/3, The values of the trigonometric functions of arcs that are multipliers of 30 degrees (pi/6) and 45 degrees (pi/4
um math prep: s14.2 - function values
The value of ∑ k = 1^131/sin (pi/4+ ( k - 1 )pi/6 )sin (pi/4+kpi/6) is equal to