mohon bantuannya kakak. fast bgt soalnya :v

tan zx = - 2/3  dan x diKD II

[ 5 sin x + 6 cos x ] / [ 2 cos x - 2 sin x ] =
...*bagi dengan cos x8

[ 5 sin x/cos x  + 6 cos x/cos x] /[ 2 cos x/cos x - 2 sin x /cos x]
=[ 5 tan x + 6] / [2  - tan x]=
= (5 (-2/3) + 6) / (2 - (-2/3))...kalikan 3/3
= (-10 +18)/(6+ 2)
= 8/8
= 1