First option is correct.
Since we have given that
JKL is a right triangle.
Length of JK = 12
Length of KL = 5
By Pythagoras theorem, we get that

So, cos (L) would be
cos(L)=base/hypotenuse
cos(L)=5/13
Hence, First option is correct.
learn more about Pythagoras theorem and cosine ratios here:
brainly.com/question/9027282
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Answer:
100-x
Step-by-step explanation:
Hope this helps:)
that question doesnt make sense!
Answer:

Step-by-step explanation:
It could also be 
depending on how the problem is actually set up.