sin B + cos B = p makaa 2 sinB.cosB???
Matematika
lialia201
Pertanyaan
sin B + cos B = p makaa 2 sinB.cosB???
2 Jawaban
-
1. Jawaban sgsherjtjncgj
[tex](sin B + cos B)^{2} = p^{2}[/tex]
[tex]sin^{2} B + 2 sin B cos B + cos^{2} B = p^{2} [/tex]
[tex]1 + 2 sin B cos B = p^{2} [/tex]
[tex]2sin B cos B = p^{2}-1 [/tex] -
2. Jawaban ArZain
Diketahui:
sin B + cos B = p
Ditanya:
2.sinB.cosB = ???
Jawab:
(sin B + cos B)² = p
sin² B + cos² B + 2.sinB.cosB = p
1 + 2.sinB.cosB = p
2.sinB.cosB = p - 1