nilai dari sin 123° cos 27 °+ cos 123° sin 27°=

Materi : Trigonometri
Kelas : XI SMA MIPA ( BAB 2 )

Rumus SIN :
》sin ( a + b ) = sin a . cos b + cos a . sin b

》sin 123 . cos 27 + cos 123 . sin 27
》sin ( 123° + 27° )
》sin 150°
》1/2

Kuadran 2 !
》sin ( + )

sin123°cos27°+cos123°sin27°
gunakan rumus:
sin(t)×cos(s)+cos(t)×sin(s)=sin(t+s)
jadi,
sin123°cos27°×cos123°sin27°
=sin(123°+27°)
=sin(150°)
=1/2
=0,5