Question

PLEASE HELP ASAP!!! I NEED CORRECT ANSWERS ONLY PLEASE!!! I NEED TO FINISH THESE QUESTIONS BEFORE MIDNIGHT TONIGHT.

Find CD.

Write your answer as an integer or as a decimal rounded to the nearest tenth.

CD =

Answer 1

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:

`cos\theta=(adj)/(hyp)`

Filling in:

`cos(59)=(4)/(hyp)`

Doing some algebraic acrobats there to solve for the hypotenuse gives you:

`hyp=(4)/(cos(59))`

Use your calculator to solve this in degree mode:

hyp = 7.8 units

Answer 2

B is 90° and c is 59°
Add those and you get 149. Subtract 180 from 149 and get 31. D is 31, c is 59, so cd is 90.