The length of side DF is 1.9
To determine the length, we need to know that the different trigonometric identities are listed as;
- sine
- cosine
- tangent
- cotangent
- secant
- cosecant
Now, to determine the length of side DF, we have to use the SOHCAHTOA rule, we get;
sin 39 = DF/3
cross multiply the values, we have;
DF = sin 39 × 3
DF = 0.629 × 3
Multiply the values
DF = 1.9