evelyn19051 evelyn19051 06-06-2023 Mathematics contestada Which equation could be used to find the value of x? Triangle DEF where angle E is a right angle. DE measures x. DF measures 55. Angle F measures 49 degrees. cos 49° = x over 55 cos 49° = 55 over x sin 49° = x over 55 sin 49° = 55 over x