<prompt> Kokotafrac12 sin 10circ - 2 sin 70circ.  <response>: Kwa jumla ya bidhaa,anzaalignfrac12 dhambi 10circ - 2 dhambi 70circ frac1 - 4 dhambi 10circ dhambi 70circ2 sin 10 circ frac1 - 2 cos 60circ - cos 80circ2 sin 10circ frac2 cos 80circ2 sin 10circ 1.mwishopanga 