There are two angles between 0 and 180 whose sine is 0.7660, one acute and one obtuse. Your calculator gives you the measure of the acute angle, 50%. The obtuse angle uses 50 as a reference angle. a. Find the measure of the obtuse angle whose sine is 0.7660. m2S-180 - 50 - 10 ESIME b. Now find the measure of ZR for the two possible triangles. m/R180-38 - m/R180 - 38 - PRES 15715 000000 PROF222CHAN 20020120 20002 100202260 c. Use the Law of Sines to complete the equations to find the two possible values of QS. Round to the nearest tenth. sin 38 12 QS sin QS or QS sin 38 sin QS