Question 31
TrigonometryThe value of tan 315° is
- A.1
- B.√2/2
- C.0
- D.−1
- E.−√2/2
Show the answer and explanation
Answer: D (−1)
Explanation
315° is in the fourth quadrant where tangent is negative, and its reference angle is 45°, so tan 315° = −tan 45° = −1.