Nilai cos 150° – sin 240°/sin 150° – cos 240° =

Penyelesaian:

cos 150° – sin 240°

sin 150° – cos 240°

= –(–cos 30°) – (–sin 60°))

   sin30° – (–cos 60°]

= –(–½√3 + ½√3)

        ½ + ½

= 0/1

= 0

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