For which angle theta is cos theta = -1?

a) 270

b) 360

c) 450

d) 540

Question

Mathematics

Natalya

22 October, 07:35

For which angle theta is cos theta = -1?

a) 270

b) 360

c) 450

d) 540

+2

Answers (2)

Know the Answer?

Aliza Stout · Answer 1

Aliza Stout 22 October, 08:51

0

Your answer would be D 540

Whitie · Answer 2

540°.

Step-by-step explanation:

On a unit circle, cos θ = - 1 at 180°.

However, cos θ has a period of 2π, or 360°. This means that cos θ will equal to - 1 again after 2π.

To solve for the angle:

180° + 360° = 540°. This is the next angle at which cos θ = - 1.

For which angle theta is cos theta = -1?a) 270b) 360c) 450d) 540

For which angle theta is cos theta = -1?

a) 270

b) 360

c) 450

d) 540