kalo bisa pake caranya ya

Trigonometri

sin α = 4/5  dan α lancip
cos α  = 3/5
tan α = 4/3

tan(180+α) - sin(270 - α) = tan α - ( - cos α) = tan α + cos α
= 4/3 + 3/5
= (20+9)/(15)
= 29/15