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# Cosine table $$\begin{array}{cc|cc|cc|cc} \alpha & \cos \alpha & \alpha & \cos \alpha & \alpha & \cos \alpha & \alpha & \cos \alpha\\ 0&1.00000&0.3&0.95534&0.6&0.82534&0.9&0.62161\\ 0.01&0.99995&0.31&0.95233&0.61&0.81965&0.91&0.61375\\ 0.02&0.99980&0.32&0.94924&0.62&0.81388&0.92&0.60582\\ 0.03&0.99955&0.33&0.94604&0.63&0.80803&0.93&0.59783\\ 0.04&0.99920&0.34&0.94275&0.64&0.80210&0.94&0.58979\\ 0.05&0.99875&0.35&0.93937&0.65&0.79608&0.95&0.58168\\ 0.06&0.99820&0.36&0.93590&0.66&0.78999&0.96&0.57352\\ 0.07&0.99755&0.37&0.93233&0.67&0.78382&0.97&0.56530\\ 0.08&0.99680&0.38&0.92866&0.68&0.77757&0.98&0.55702\\ 0.09&0.99595&0.39&0.92491&0.69&0.77125&0.99&0.54869\\ 0.1&0.99500&0.4&0.92106&0.7&0.76484&1&0.54030\\ 0.11&0.99396&0.41&0.91712&0.71&0.75836&1.01&0.53186\\ 0.12&0.99281&0.42&0.91309&0.72&0.75181&1.02&0.52337\\ 0.13&0.99156&0.43&0.90897&0.73&0.74517&1.03&0.51482\\ 0.14&0.99022&0.44&0.90475&0.74&0.73847&1.04&0.50622\\ 0.15&0.98877&0.45&0.90045&0.75&0.73169&1.05&0.49757\\ 0.16&0.98723&0.46&0.89605&0.76&0.72484&1.06&0.48887\\ 0.17&0.98558&0.47&0.89157&0.77&0.71791&1.07&0.48012\\ 0.18&0.98384&0.48&0.88699&0.78&0.71091&1.08&0.47133\\ 0.19&0.98200&0.49&0.88233&0.79&0.70385&1.09&0.46249\\ 0.2&0.98007&0.5&0.87758&0.8&0.69671&1.1&0.45360\\ 0.21&0.97803&0.51&0.87274&0.81&0.68950&1.11&0.44466\\ 0.22&0.97590&0.52&0.86782&0.82&0.68222&1.12&0.43568\\ 0.23&0.97367&0.53&0.86281&0.83&0.67488&1.13&0.42666\\ 0.24&0.97134&0.54&0.85771&0.84&0.66746&1.14&0.41759\\ 0.25&0.96891&0.55&0.85252&0.85&0.65998&1.15&0.40849\\ 0.26&0.96639&0.56&0.84726&0.86&0.65244&1.16&0.39934\\ 0.27&0.96377&0.57&0.84190&0.87&0.64483&1.17&0.39015\\ 0.28&0.96106&0.58&0.83646&0.88&0.63715&1.18&0.38092\\ 0.29&0.95824&0.59&0.83094&0.89&0.62941&1.19&0.37166\\ \end{array}$$ === $$ \begin{array}{cc|cc|cc|cc} \alpha & \cos \alpha & \alpha & \cos \alpha & \alpha & \cos \alpha & \alpha & \cos \alpha \\ 1.2&0.36236&1.5&0.07074&1.8&-0.22720&2.1&-0.50485\\ 1.21&0.35302&1.51&0.06076&1.81&-0.23693&2.11&-0.51345\\ 1.22&0.34365&1.52&0.05077&1.82&-0.24663&2.12&-0.52201\\ 1.23&0.33424&1.53&0.04079&1.83&-0.25631&2.13&-0.53051\\ 1.24&0.32480&1.54&0.03079&1.84&-0.26596&2.14&-0.53896\\ 1.25&0.31532&1.55&0.02079&1.85&-0.27559&2.15&-0.54736\\ 1.26&0.30582&1.56&0.01080&1.86&-0.28519&2.16&-0.55570\\ 1.27&0.29628&1.57&0.00080&1.87&-0.29476&2.17&-0.56399\\ 1.28&0.28672&1.58&-0.00920&1.88&-0.30430&2.18&-0.57221\\ 1.29&0.27712&1.59&-0.01920&1.89&-0.31381&2.19&-0.58039\\ 1.3&0.26750&1.6&-0.02920&1.9&-0.32329&2.2&-0.58850\\ 1.31&0.25785&1.61&-0.03919&1.91&-0.33274&2.21&-0.59656\\ 1.32&0.24818&1.62&-0.04918&1.92&-0.34215&2.22&-0.60455\\ 1.33&0.23848&1.63&-0.05917&1.93&-0.35153&2.23&-0.61249\\ 1.34&0.22875&1.64&-0.06915&1.94&-0.36087&2.24&-0.62036\\ 1.35&0.21901&1.65&-0.07912&1.95&-0.37018&2.25&-0.62817\\ 1.36&0.20924&1.66&-0.08909&1.96&-0.37945&2.26&-0.63592\\ 1.37&0.19945&1.67&-0.09904&1.97&-0.38868&2.27&-0.64361\\ 1.38&0.18964&1.68&-0.10899&1.98&-0.39788&2.28&-0.65123\\ 1.39&0.17981&1.69&-0.11892&1.99&-0.40703&2.29&-0.65879\\ 1.4&0.16997&1.7&-0.12884&2&-0.41615&2.3&-0.66628\\ 1.41&0.16010&1.71&-0.13875&2.01&-0.42522&2.31&-0.67370\\ 1.42&0.15023&1.72&-0.14865&2.02&-0.43425&2.32&-0.68106\\ 1.43&0.14033&1.73&-0.15853&2.03&-0.44323&2.33&-0.68834\\ 1.44&0.13042&1.74&-0.16840&2.04&-0.45218&2.34&-0.69556\\ 1.45&0.12050&1.75&-0.17825&2.05&-0.46107&2.35&-0.70271\\ 1.46&0.11057&1.76&-0.18808&2.06&-0.46992&2.36&-0.70979\\ 1.47&0.10063&1.77&-0.19789&2.07&-0.47873&2.37&-0.71680\\ 1.48&0.09067&1.78&-0.20768&2.08&-0.48748&2.38&-0.72374\\ 1.49&0.08071&1.79&-0.21745&2.09&-0.49619&2.39&-0.73060\\ \end{array} $$ === $$ \begin{array}{cc|cc|cc|cc} \alpha & \cos \alpha & \alpha & \cos \alpha & \alpha & \cos \alpha \\ 2.4&-0.73739&2.7&-0.90407&3&-0.98999\\ 2.41&-0.74411&2.71&-0.90830&3.01&-0.99135\\ 2.42&-0.75075&2.72&-0.91244&3.02&-0.99262\\ 2.43&-0.75732&2.73&-0.91648&3.03&-0.99378\\ 2.44&-0.76382&2.74&-0.92044&3.04&-0.99484\\ 2.45&-0.77023&2.75&-0.92430&3.05&-0.99581\\ 2.46&-0.77657&2.76&-0.92807&3.06&-0.99667\\ 2.47&-0.78283&2.77&-0.93175&3.07&-0.99744\\ 2.48&-0.78901&2.78&-0.93533&3.08&-0.99810\\ 2.49&-0.79512&2.79&-0.93883&3.09&-0.99867\\ 2.5&-0.80114&2.8&-0.94222&3.1&-0.99914\\ 2.51&-0.80709&2.81&-0.94553&3.11&-0.99950\\ 2.52&-0.81295&2.82&-0.94873&3.12&-0.99977\\ 2.53&-0.81873&2.83&-0.95185&3.13&-0.99993\\ 2.54&-0.82444&2.84&-0.95486&3.14&-1.00000\\ 2.55&-0.83005&2.85&-0.95779\\ 2.56&-0.83559&2.86&-0.96061\\ 2.57&-0.84104&2.87&-0.96334\\ 2.58&-0.84641&2.88&-0.96598\\ 2.59&-0.85169&2.89&-0.96852\\ 2.6&-0.85689&2.9&-0.97096\\ 2.61&-0.86200&2.91&-0.97330\\ 2.62&-0.86703&2.92&-0.97555\\ 2.63&-0.87197&2.93&-0.97770\\ 2.64&-0.87682&2.94&-0.97975\\ 2.65&-0.88158&2.95&-0.98170\\ 2.66&-0.88626&2.96&-0.98356\\ 2.67&-0.89085&2.97&-0.98531\\ 2.68&-0.89534&2.98&-0.98697\\ 2.69&-0.89975&2.99&-0.98853\\ \end{array} $$