Skip to content / Đến nội dung
ThichHocToan.com

SEAMO 2023 — Paper E — Grade 9–10 Question 6

SEAMO · SEAMO 2023 — Paper E — Grade 9–10

Question 6

Evaluate $\displaystyle\sum_{r=1}^{89}\log_{10}\tan\frac{\pi r}{180}$.
  1. $0$
  2. $1$
  3. $2$
  4. $3$
  5. Cannot be determined