SOLUTION: Solve the given equation. (Enter your answers as a comma-separated list. Let k be any integer. Round terms to two decimal places where appropriate.)
cos θ = 1/2
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Question 729404: Solve the given equation. (Enter your answers as a comma-separated list. Let k be any integer. Round terms to two decimal places where appropriate.)
cos θ = 1/2
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
In the first quadrant, we know that (using degrees), or if we prefer radians.
In the fourth quadrant, we also know that (using degrees), or if we prefer radians.
Angles in the second and third quadrants have negative cosines, so no solutions there.
For angles co-terminal with those, we can add multiples of , or if we prefer radians to degrees.
All of those solutions can be written in one formula as
if we prefer radians, or if we prefer degrees.
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