Sin [tex] \frac{3}{2}[/tex]a . Sin [tex] \frac{1}{2}[/tex]a =
Matematika
hawkeyes
Pertanyaan
Sin [tex] \frac{3}{2}[/tex]a . Sin [tex] \frac{1}{2}[/tex]a =
1 Jawaban
-
1. Jawaban NurrachmanBudiMulya
= 1/2 (-cos (3/2a + 1/2a) + cos (3/2a - 1/2a))
= 1/2 (-cos 2a + cos a)
= -1/2 cos 2a + 1/2 cos a