try drowing a tringle diagram then use sign rule so sinx/6=sin36/4 so x =61.8 61.8+36=97.8 angel of tringles total is 180 so 180-97.8=82.2 this is one possible value but also x can be 180 -61.8=118.2 *they have same sin value *lies in the second qurtile(sp?) so 118.2+36=154.2 total of angels of tringle is 180 so 180-154.2=25.8