Materi TRIGONOMETRI Tingkat X SMA

pakai kuadran IV

cos x = √5/5
samping = √5
miring = 5
depan = √{(5)²-(√5)²}
depan = √20
depan = 2√5

sin x = depan/miring
sin x = 2√5/5

cot (μ/2 - x)
= cot ( 90 - x )
= tan x
tan dikuadran IV bernilai negatif

= -tan x
= -(sin x/ cos x)
= -(2√5/5)/(√5/5)
= -2.......A