Hitunglah nilai trigometri berikut a.sin 750° b. cos 420° c. tan (-900)°

a.
sin 750°
= sin (2*360° + 30°)
= sin 30°
= 1/2

b.
cos 420
= cos (360+60)
= cos 60
= 1/2

c.
tan(-900)
= -tan (2*360+180)
= - tan 180
= - (tan 180-0)
= -tan 0
=0