How do you solve $cos theta= -0.5$ ?

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Answer 1 · 2016-11-18T22:59:37

Arccos (-0.5)= 120 degrees

To solve this equation, you must find the unknown (theta).

$Cos$ $theta$ = -0.5

Use the inverse of cosine (Arccos) to find the angle measurement (in degrees) of theta.

$theta$ = $Arccos$ (-0.5)

If you reference a unit circle or use a calculator, that would be 120 degrees.

Hope this helped!

How do you solve cos theta= -0.5cos theta= -0.5?