hitung nilai sin 270°+cos135°-tan135°/sin 150°.cos 225°

sin 270° = -1
cos 135° = -1/2√2
tan 135° = -1
sin 150° = 1/2
cos 225° = -1/2√2
=> sin 270°+cos 135° -tan 135° / sin150°. cos 225° adalah:
-1 + (-1/2√2) -(-1) / 1/2. (-1/2√2)
=> -1/2√2 / -1/4√2
=> 1