sin(a) = 1/√2
tg(a) = 1
ctg(a) = 1
Объяснение:
sin(a) = √1-сos2(a)
sin(a) = √ (1 - 2/4) = √ (1/2) = 1/√2
tg(a) = sin(a) / cos(a) = 1√2 / √2/2 = 1
ctg(a) = 1/tg = 1/1 = 1
