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Nayya Dewinta Hidayani
Student XI IPA
1) Tentukan tp Cos 2x - 5 cosx-2=0 untuk 180 cх4 270"
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Putra Gema Nusa
Rockstar Teacher GURU SMA
los 2x 5 cos X -2=0 # X = 120° + k. 360° TM 2 2 cos - x -1 -5 cos x -2=0 2 cos²x-5 asx - 3 =0 # x=-120° tk. 360° a 2 0 :> K= 1 ) X = 240° 2 = { (2.45 X – 6 )(2.40sx + 1) 0 (105 x – 3) (205 x + 1) = 0 cosx = 3 V cos x = -1 = 3 V X cos 60° as x = cos (180° – 60°) I :: HP= { 24043 = s ТИИ los X = o los X = CS 120° Pahamify
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