Question

For which angle θ is cos θ = −1?
a. 270° b. 360° c. 450° d. 540°

Answer 1

Answer: Dude adove is WRONGGG

Explanation:

ANSWER IS 540

Answer 2

c. 540°

Explanation:

You want to know which angle θ has cos(θ) = -1.

Cosine

The cosine function is periodic with period 360°. The smallest positive angle θ for which cos(θ) is -1 is 180°. The next such angle is ...

180° +360° = 540° . . . . . choice D

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Additional comment

A graph of the cosine function is attached. The horizontal axis is in degrees.

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