Question Number 198900 by Safojon last updated on 25/Oct/23
$$\frac{\mathrm{2}{sin}\mathrm{2}°+\mathrm{4}{sin}\mathrm{4}°+…+\mathrm{180}{sin}\mathrm{180}°}{\mathrm{90}}=? \\ $$$${calculate}.{help}\:{me}\:{pleas}. \\ $$
2sin2-4sin4-180sin180-90-calculate-help-me-pleas-