Question

Вычислите (tg α - ctg α) : (sin α - cos α), если sin α + cos α=1,2

Answer 1

(sin^2a-cos^2a)/(Sina-cosa)Sina*costa=1,2/(1/2sin2a)=1,2/(1/2(1,44-1))=
=1,2/(1/2*0,44)=1,2/0,22=(12/10)*(100/22)=60/11=5 5 /11