Answer:
Step-by-step explanation:
This is classic right triangle trig. We have the reference angle of 59 degrees, we have the side adjacent to that angle of 4 units, and we are looking for CD which is the hypotenuse of the triangle. That is the cosine ratio:
[tex]cos\theta=\frac{adj}{hyp}[/tex]
Filling in:
[tex]cos(59)=\frac{4}{hyp}[/tex]
Doing some algebraic acrobats there to solve for the hypotenuse gives you:
[tex]hyp=\frac{4}{cos(59)}[/tex]
Use your calculator to solve this in degree mode:
hyp = 7.8 units
