18: Addition of Angles and Multiple Angles Last updated Oct 4, 2021 Save as PDF 17.3: Exercises 18.1: Addition and subtraction of angles Page ID49072 Thomas Tradler and Holly CarleyCUNY New York City College of Technology via New York City College of Technology at CUNY Academic Works ( \newcommand{\kernel}{\mathrm{null}\,}\) 18.1: Addition and subtraction of angles18.2: Double and half angles18.3: Exercises