Question

5. Find the angle measure to the nearest degree.

tan(W) = 19.0811
O 13 degrees
O 87 degrees
O 3 degrees
O 90 degrees

Answer 1

Explanation:

Tan-1(19.0811) = 86.999994

That's about as close to 87 as you can get with 6 places of accuracy. The trick is knowing how to get the inverse tangent (tan-1(x) ), or maybe it is just knowing that you have to get it. The inverse tan starts with a decimal number that comes from the tangent definition Tan(theta) = opposite / adjacent.

So what you are starting with is the ratio for the Tangent and you are trying to find the angle theta. In this case, it is 87.