Tan 225 kali cos 300 - sin 150 kali cos 330 / sin 120

Tan 225 = Tan 45 = 1
cos 300 = cos 60 = 1/2
sin 150 = sin 30 = 1/2
cos 330 = cos 30 = 1/2√3
sin 120 = sin 60 = 1/2√3

(1×1/2)-(1/2×1/2√3) / 1
= 1×1/2-1/2 = 2/4-1/2 = 0


insyaallah.. semoga benar dan bisa membantu