Hitunglah sin 60 cos 300 + cos 60 sin 300?

Bab Trigonometri

sin(A + B) = sinA.cosB + cosA.sinB

sin 60° . cos 300° + cos 60° . sin 300°
= sin (60° + 300°)
= sin 360°
= 0

Gunakan sifat :
sin (a + b) = sin a cos b + cos a sin b

Disini
sin 60 cos 300 + cos 60 sin 300

-->
sin (60 + 300)
= sin 360
= sin (360 - 0)
= sin 0
= 0