<prompt> Tatua2 dhambi theta dhambi 2 theta dhambi 4 theta dhambi 6 theta dots dhambi 14 theta cos theta - frac12 ambapo 0circ le theta le 24circ. Weka suluhu zote zinazowezekana, zikitenganishwa na koma.  <response>: Kupanua, tunapata2 dhambi theta dhambi 2 theta 2 dhambi theta dhambi 4 theta 2 dhambi dhambi 6 theta dots 2 dhambi theta dhambi 14 theta cos theta - frac12.Kwa kutumia fomula ya jumla ya bidhaa, tunaweza kuandika upande wa kushoto kamaanzaalign2 dhambi theta dhambi 2 theta 2 dhambi theta dhambi 4 theta 2 dhambi dhambi 6 theta dots 2 dhambi theta dhambi 14 theta cos theta - cos 3 theta cos 3 theta - cos 5 theta cos 5 theta - cos 7 theta dots cos 13 theta - cos 15 theta cos theta - cos 15 theta.endalignKwa hivyo, cos 15 theta frac12.Tangu 0circ le theta le 24circ, 0circ le 15 theta le 360circ. Hivyo, 15 theta 60circ au 15 theta 300circ, ambayo inaongoza kwa suluhu 4circ, 20circ. 