Question 36
Evaluate the expression $\left(1+\tan 7.5^\circ\right)\left(1+\tan 18^\circ\right)\left(1+\tan 27^\circ\right)\left(1+\tan 37.5^\circ\right)$.
MathNet 2018-part-04 — 181 problems (EN–VI) Question 36
Math Olympiad Vault · MathNet 2018-part-04 — 181 problems (EN–VI)