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= 30
sec 30 = 2/3 akar3
tan 120 = 180-120
=60
tan 60 = - akar3
sin 315 = 360-315
= 45
sin 45 = -1/2 akar2
= sec 30. (- tan 60) (- sin 45)
= 1/cos 30. (- tan 60) (- sin 45)
=
=