You can use the cosine rule for this - you might have to change some of the letters around for it to make sense though. Hope this helps!
See picture for reply and solution steps.
Answer:
f (x) = a(x - h)2 + k, where (h, k) is the vertex of the parabola. ... When written in "vertex form": • (h, k) is the vertex of the parabola, and x = h is the axis of symmetry.
Answer:
91.61
Step-by-step explanation:
thats what i got