Question 51
Simplify
$$
2 \cos^{2}(\ln (2009) i) + i \sin (\ln (4036081) i)
$$
$$
2 \cos^{2}(\ln (2009) i) + i \sin (\ln (4036081) i)
$$
MathNet 2009-part-05 — 172 problems (EN–VI) Question 51
Math Olympiad Vault · MathNet 2009-part-05 — 172 problems (EN–VI)