Mathematics

Mathematics, 16.07.2019 00:40, Alexmills6093

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 d measures 49 degrees.
cos 49° = x over 55
cos 49° = 55 over x
sin 49° = x over 55
sin 49° = 55 over x

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