cos(pi – (1/3)) + cos((3*pi)/2 + (1/3)) + cos(-(1/3))*sin(-(1/3))
cos(pi – 1/3) + cos((3*pi)/2 + 1/3) + cos(-1/3)*sin(-1/3)
-cos(1/3) – cos(1/3)*sin(1/3) + sin(1/3)
cos(-a)*sin(-a) + cos(pi – a) + cos((3*pi)/2 + a)
sin(2*a) ___ / pi
– ——– – / 2 *cos|a + –|
2 4 /
/3*pi
cos(-a)*sin(-a) + cos(pi – a) + cos|—- + a|
2 /
cos(-a)*sin(-a) + cos(pi – a) + sin(a)
sin(2*a) ___ / pi
– ——– – / 2 *cos|a + –|
2 4 /
-cos(a) – cos(a)*sin(a) + sin(a)
-cos(a) – cos(a)*sin(a) + sin(a)