Dik. Cos A=12/16. Hitunglah tan A dan sin A, jika A sudut lancip
Jawaban Terkonfirmasi
cos A = 12/16 = 3/4
tan² A + 1 = 1/cos² A
tan² A + 1 = 1/(3/4)²
tan² A + 1 = 1/(9/16)
tan² A + 1 = 16/9
tan² A = (16/9) – 1
tan² A = 7/9
tan A = √(7/9)
= (1/3)√7
sin² A + cos² A = 1
sin² A + (3/4)² = 1
sin² A + 9/16 = 1
sin² A = 1 – 9/16
sin² A = 7/16
sin A = √(7/16)
sin A = (1/4)√7