Using Pythagorean Theorem 9 to the second is 81 and 3 to the second is 9 ... u add those two together it’s 90 and take the square root of that and it’s 9.48 round that as the question asked?
Since you have an angle and at least one side you can use either sine, cosine or tan. For this question, you would use sine like above. Hope this helps!
