The a is 1 and the b is 0
Answer: I'm not entirely sure, but maybe 1/x^2?

Explanation
Step 1
a) let

b) b value
to find the measure of side b we can use cosine function

c) angle B
to find the measure of Angle B we can use sine function

d) side a

so, the answer is

I hope this helps you
Answer:
3/4
Step-by-step explanation:
54/72 simplified is the same as 3/4