Ini gimana???pake caranya yaa!!!!jangan asal jawab aja

1. 1/2 x 1/2 =
2. (1/2)√2 x 1 / 1 =
3. (1/2)² + 1² =
4. ((1/3)√3 + (1/2))((1/2)√3)
= (1/6)x3 + (1/4)√3
= (1/2) + (1/4)√3

tinggal d substitusi nh... :D