Найдите значения sina,cosa,tga и ctg, если 1) a=3П/2, 2) а=3П/4, 3) а=5П/6.

1) sin(3π/2) = - 1cos(3π/2) = 0tg(3π/2) = не определёнctg(3π/2) = 02) sin(3π/4) = sin(π - π/4) = sin(π/4) = √2/2cos(3π/4) = cos(π - π/4) = - cos(π/4) = - √2/2tg(3π/4) = tg(π - π/4) = - tg(π/4) = - 1ctg(3π/4) = ctg(π - π/4) = - ctg(π/4) = - 13) sin(5π/6) = sin(π - π/6) = sin(π/6) = 1/2 = 0,5cos(5π/6) = cos(π - π/6) = - cos(π/6) = - √3/2tg(5π/6) = tg(π - π/6) = - tg(π/6) = - √3/3ctg(5π/6) = ctg(π - π/6) = - ctg(π/6) = - √3