ocr: Suppose sin6 18--3 5 with II 158s3m 2 3 IL Find sin 28 and sin- 8 2 From the values 31 of sin 8 andcos 8 QIII we: can calculate the values of sin 28 and sine 2 The angle 28 must lie in Quadrant I or Quadrant II; in either case, the sine is positive. sin 28=2 sin 80 Xc058-2-21-4)-2 25 - Using Multiple-Angle Formulas
