Question

Tan 3/4 phi =
jika cos 10° = m maka sin 100° =

Answer 1

Tan 3/4 pi
Mengingat pi = 180°
Maka,
tan 3/4 pi = tan 3/4 x 180°
tan 3/4 pi = tan 135°
tan 3/4 pi = tan(180-45)°
tan 3/4 pi = -tan 45°
tan 3/4 pi = -1

Dan,
cos 10° = m
Maka,
sin 100 = sin(180-80)
sin 100 = sin 80
Dan,
sin 100 = cos(90-80)
sin 100 = cos 10
sin 100 = m