Question 33
TrigonometryThe value of sin 210° is
- A.−½
- B.−√3/2
- C.½
- D.√2/2
- E.√3/2
Show the answer and explanation
Answer: A (−½)
Explanation
210° is in the third quadrant where sine is negative, with reference angle 30°: sin 210° = −sin 30° = −½.
The value of sin 210° is
Answer: A (−½)
210° is in the third quadrant where sine is negative, with reference angle 30°: sin 210° = −sin 30° = −½.