1-sin 45 _____- x tan (1/2 x)

sin 150 <=> sin (180 - 30) = sin 30 = 1/2cos 225 <=> cos (180+45) = - cos 45 = -1/2 akar 2tan 330 <=> tan (360 - 30) = - tan 30 = 1/3 akar 3cosec 45 = akar 2cot 120 <=> cot (180 - 60) = - cot 60 = - 1/3 akar 3sec 135 <=> sec (180 - 45) = - sec 45 = - akar 2tan (-45) = -1sin 450 <=> sin (360 + 90) = sin 90 = 1