How do you find the theta in vector addition?

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How would you find the theta if the resultant vector equals 8, y equals 3, and x equals 7?

Guest Aug 21, 2014

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Best Answer

First, if x = 7 and y = 3, you couldn't have a resultant of 8. The resultant would be √(7² + 3²) = √ (49 + 9) = √(58)

To find theta, use the tangent inverse. So we have tan^-1 (3/7) ≈ 23.2°

CPhill Aug 22, 2014

CPhill · Answer 1 · 2014-08-22T02:06:20

First, if x = 7 and y = 3, you couldn't have a resultant of 8. The resultant would be √(7² + 3²) = √ (49 + 9) = √(58)

To find theta, use the tangent inverse. So we have tan^-1 (3/7) ≈ 23.2°