Question

Tan (a+b) = 0,5, tg (b+c)= 0,333... maka tg (c-a) =... thx

Answer 1

Ingat: c - a = c+b - (a+b)
tan (c - a)
= tan (b+c - (a+b))
= tan (b+c) - tan (a+b) / [1 + tan (b+c) tan (a+b)
= 1/3 - 1/2 / [1 + 1/6]
= -1/6 / 7/6
= -1/7