Asked by Diana
cos theta= .5
2cos theta= .5
how do you do this?
2cos theta= .5
how do you do this?
Answers
Answered by
Steve
If you are trying to solve for theta, then recall your commonly used angles.
cos 60° = .5
so, theta = 60°
2 cos theta = .5
so,
cos theta = .25
That's a bit tougher, so consult your calculator or a table of arccos, to find that
cos 75.5° = .25
so, theta = 75.5°
Judging from the question, I assume we're not worried about quadrants and reference angles...
cos 60° = .5
so, theta = 60°
2 cos theta = .5
so,
cos theta = .25
That's a bit tougher, so consult your calculator or a table of arccos, to find that
cos 75.5° = .25
so, theta = 75.5°
Judging from the question, I assume we're not worried about quadrants and reference angles...
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