Sin 135° cos 330° – coa 315° sin 150 ° / 1+tan² 240° =​

Penjelasan dengan langkah-langkah:

= {sin (135) cos (330) – cos (135) sin (150) }/ 1 + tan² (240)

= {sin (180 – 45) cos (360 – 30) – cos ( 180 – 45) sin (180 – 30)} / 1 + tan² (180 + 60)

= {sin 45 cos 30 – (- cos 45) sin 30}/1 + tan² 60

= { √2/2 x √3/2 + √2/2 x 1/2 } / 1 + (√3)²

= {(√6 + √2)/4} / 4

= (√6 + √2)/16