3 years ago

0 is in quadrant III and cos^2 0=1/4

Mathematics

1 answer:

Jlenok [28]3 years ago

5 0

Answer:

θ = 240

and

cos(θ) = -0.5

Step-by-step explanation:

Theta is in the third quadrant, that meansit goes from 180 to 270 degrees

Then,

cos^2 (θ) =1/4

cos (θ) = ± 1/2

θ = arccos(0.5)

θ = 60

But in the third quadrant

θ = 180 + 60 = 240

θ = 240

and

cos(θ) = -0.5

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