Ответы и объяснения

2012-12-27T10:31:06+00:00

tgX - 3ctgX = 2

tgX - 3/tgX = 2

tg²X - 3 = 2tgx

tg²X - 2tgX - 3 = 0

(tgX - 3)(tgX +1) = 0

tgX = 3 ili tgX = -1

X₁ = arctg3     X₂ =  135