sin 315,cos 2400,tan 315, cot 300, sin 750, cos 1110, tan 570

sin 315
= sin (360 - 45)
= -sin 45
= -(1/2)√2

cos 2400
= cos (6.360 + 240)
= cos 240
= cos (180 + 60)
= -cos 60
= -1/2

tan 315
= tan (360-45)
= tan 45
= 1

cot 300
= cot (360-60)
= cot 60
= 1/tan 60
= 1/(√3)
= (1/3)√3

sin 750
= sin (360.2 + 30)
= sin 30
= 1/2

cos 1110
= cos ( 360.3 + 30)
= cos 30
= (1/2)√3

tan 570
= tan (360 + 210)
= tan 210
= tan (180+30)
= tan 30
= (1/3)√3

bila masih kurang ngerti , baca lagi subbab kuadran dan perbandingan trigono utk sudut lbih dari 360°

smg berfaeda