Question

Tentukan nilai sin, cos, tan dari :
1. 315 derajat
2. 360 derajat
3. -30 derajat
4. -120 derajat
5. -225 derajat

Answer 1

1. sin 315 = -(1/2)√2
  cos 315 = (1/2)√2
tan 315 = -1

2. sin 360 = 0
cos 360 = 1
tan 360 = 0

3. sin - 30 = -1/2
cos -30 = (1/2)√3
tan - 30 = -(1/3)√3

4. sin - 120 = -(1/2)√3
cos - 120 = - 1/2
tan -120 = √3

5. sin - 225 = (1/2)√2
cos - 225 = - (1/2)√2
tan - 225 = -1