Question

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

Answer 1

Answer: the thrid one

Step-by-step explanation:

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Answer 2

Using trigonometric ratios, the suitable equation to find the value of x is sin 49° = x over 55.

What are trigonometric ratios?

The six trigonometric ratios are sine (sin), cosine (cos), tangent (tan), cotangent (cot), cosecant (cosec), and secant (sec).

In this question,

sin $\alpha$ = perpendicular/ hypotenuse

sin 49 = x/55

x = sin49° x 55

Learn more about trigonometric ratios here

https://brainly.com/question/14746686

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