Which equation could be used to find the value of x?

Triangle DEF where angle E is a right angle. DE measures 55. EF measures x. Angle D measures 49 degrees.

cos 49° = x over 55
tan 49° = x over 55
cos 49° = 55 over x
tan 49° = 55 over x

Which equation could be used to find the value of x Triangle DEF where angle E is a right angle DE measures 55 EF measures x Angle D measures 49 degrees cos 49 class=