Sin150° cos135° tan60° : (sin300° - cos225°)

Cara simple buat lu yg gl hafal trigonometri lbh dr 90°
•sin150°=sin(90+60)=cos60°=1/2
•cos135°=cos(180-45)= -cos45°= -1/2√2
•tan60°=√3
•sin300°= sin(360-60)= -sin60°= -1/2√3
•cos225°= cos(180+45)= -cos45°= -1/2√2
*1/2 × -1/2√2 × √3 : (-1/2√3 - (-1/2√2))
= 1/2 × -1/2√2 × √3 : (√3√2)
= -1/4√6 : √6 (dikali akar sekawan nya ya)
= -1
Makasih, smoga bermanfaat&jgn lupa jdikan jwbn yg terbaik yaa☺