Question 38
TrigonometryWhat is the value of sin (−690°)?
- A.√3/2
- B.−√3/2
- C.−½
- D.½
Show the answer and explanation
Answer: D (½)
Explanation
Adding 720° (two full turns) doesn't change sine: sin(−690°) = sin 30° = ½.
What is the value of sin (−690°)?
Answer: D (½)
Adding 720° (two full turns) doesn't change sine: sin(−690°) = sin 30° = ½.