Jawabanmu

2014-06-06T01:26:53+07:00
Tan 30 = 1/ akar 3
sin 150 = sin (180-150)
= sin 30
= 1/2
cot 120 = cot (180-120)
= cot 60
= 1/ akar 3
1/ akar 3 . 1/2 + 1/ akar 3 = 1/2 akar 3 + 1/ akar 3 = 3/2 akar 3 = akar 3 /2