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colleen dora
Student XII IPA
Himpunan penyelesaian persamaan 2 tan2 x - sec x = -1 untuk 0º <x< 360° adalah.... A. {0°} B. (180°} c. {360°} D. {0°, 180°} E. {0°,360"}
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Putra Gema Nusa
Rockstar Teacher GURU SMA
2 tan²x - secx 2 Sin²x cos" X os x = as X = cos o # x = 1 0 + k. 360° x - k. 360° -> k = 0, x = 0 11 2 as X cos²x a skal X = 360° I si Hp = {0°,3603 HP 5 2 sin²x - cosx - cos2x 2 (1-cos?x) – COS X = - COS?x 2 -2 cos²x - Wsx - cos2x -205²x + cos2x - cos x + 2 a - cos2x - cosx + 2 = 0 cos²x + losx - 2 2 (cos x + 2 yas x - 1) = 0 X » OSX +2=0 as x-1=0 OS X = -2 asx=1 Dahamify ТМ Đ vo
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