4. In the triangle ABC, AB = 8 cm , AC = 7 cm , angle ABC=28.6^ and angle ACB=x degrees. Use the appropriate trigonometrical rule to find the value of sin x giving your answer to 3 decimal places

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?