9. Determine the values for a, b, c, d, and e below. Using Trigonometry to Calculate Lengths Learning Objective: Use Trigonometry to calculate missing lengths in right-angled triangles. Calculate the missing lengths in the right-angled triangles. ba 45 h 60 4 cm a sin (60)=4 60 sin (4)-a a=3.469 30 sin (75) = a 41 75 sin (6)=C c= 7.84 n 13 cm 12.6 cm sin (45) = 1/3 45 sin (13)-b b = 10-12 45 d 498 75 6 cm 539 Trigonometric Ratios Sin - Opposite Hypotenuse Tan 8-Opposite Adjacent Cos 8 - Adjacent 7.4 cm Hypotenuse 37