[tex] - 2 { \sin}^{2} \sin(15) \sin(75) = [/tex] tolong bantuu

TriGonoMetRi

-2 sin² (sin 15 sin 75)
= -2 sin² (sin 15 cos 15)
= -2 sin² (1/2 sin 2(15))
= -2 sin² (1/2 sin 30°)
= -2 sin² (1/4)

#cek_soal