diketahui tan a - tan b = 1/3, cos a cos b = 48/65 dan a, b lancip. Nilai sin (a-b)=...
Matematika
RismaAlmalia
Pertanyaan
diketahui tan a - tan b = 1/3, cos a cos b = 48/65 dan a, b lancip. Nilai sin (a-b)=...
1 Jawaban
-
1. Jawaban Anonyme
TriGonoMetRi
cos a cos b = 48/65
tan a - tan b = 1/3
Kdua ruas kalikan cos a cos b
sin a cos b - cos a sin b = 1/3 cos a cos b
sin (a - b) = 1/3 × 48/65
sin (a - b) = 16/65 ✔