Question

Tolong dijawab ya plisss pakek caranya ya

Answer 1

{ sin 150  + cos 300 }/ {tan 225 - sin 300} =

= { sin(180-30) + cos(360-30)}/{tan(180+45) - sin(360-60)}
= { sin 30 + cos 30 } / { tan 45 - (-sin 60)}
= ( 1/2 + 1/2√3 ) / ( 1 + 1/2√3) 
= 1/2 ( 1 + √3) / 1/2 ( 2 + √3)
= (1 + √3)/(2 + √3) ....kalikan akar sekawan
.
= (1+√3)(2 -√3) / (2+√3)(2-√3)
= (2 -3 +√3) / (4-3)
= (-1 + √3)
atau
= √3  -  1