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Student XI IPA
Soal 4.* 10 points 4. Himpunan nilaix dari 25cos*x -35 cos x + 12 = 0 untuk 180° sxs 180° adalah... A 30°, 150 D. 4-539-37937:53 B. 300:37, 143°: 150° 160, 120°; 240°, 300°) C. 109, 120°: 240, 360 А B с D Pilihan Jawaban O C С
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Putra Gema Nusa
Rockstar Teacher GURU SMA
25 as? X-35 65 x + 12 = 0,-180° X4 180* 25 cos²x - 15 osx - 20 asx +12=0 Guos x (5 cos x – 3) – 4 ( 5cosx – 3) = 0 (5 @S X -3) (5 WSX-4) = 0 OS X = } 모 v as x= (= 1 / 5 cos X ~ WS 37° WS X & COS 53 > X = 37° tk. 360° -> X = 53° + k. 360° k=0 <D X=37° k=0 DX=53 X = -27° tk. 360° -> X = -53° tk. 360° K = 0 DX=-37° k=00x=-53° ก n Đ :. HP = {-53° , -37,37,3393 D. Pahamify
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