Question

When finding cosθ=3√2
on a unit circle, what type of special right triangle or a ray is used?(1 point)
Responses

a horizontal ray from the origin
a horizontal ray from the origin

a vertical ray from the origin
a vertical ray from the origin

45-45-90 triangle
45-45-90 triangle

30-60-90 triangle

Answer 1

45-45-90 triangle.

Reason: cosine values involving √2/2 come from the 45° (isosceles right) triangle. (Note: cosθ = 3√2 is impossible on the unit circle since |cosθ| ≤ 1 — you probably meant a value like √2/2 or 3√2/2.)