Question

Jacob performs the work shown to find tan Tangent 165 degrees. Tangent 165 degrees = negative StartRoot StartFraction 1 + cosine 330 degrees Over 1 minus cosine 330 degrees EndFraction EndRoot = negative StartRoot StartStartFraction 1 + (StartFraction StartRoot 3 EndRoot Over 2 EndFraction) OverOver 1 minus (StartFraction StartRoot 3 EndRoot Over 2 EndFraction) EndEndFraction = negative StartRoot StartStartFraction 2 + StartRoot 3 EndRoot Over 2 EndFraction OverOver StartFraction 2 minus StartRoot 3 EndRoot Over 2 EndFraction EndEndFraction EndRoot Equals negative StartRoot StartFraction 2 + StartRoot 3 EndRoot Over 2 minus StartRoot 3 EndRoot EndFraction EndRoot. Equals negative StartStartRoot 7 + 4 StartRoot 3 EndRoot EndEndRoot. Observe Jacob’s work. Use the drop down box to complete the statement. The error in Jacob’s work is

Answer 1

Jacob's error is in using an incorrect value for cosine 330 degrees.

Step-by-step explanation:

Jacob's error in finding the value of tangent 165 degrees is in the calculation of the cosine of 330 degrees. Instead of using the correct value, he used an incorrect value of cosine 330 degrees. By substituting the correct value, we can obtain the accurate result for tangent 165 degrees.

Answer 2

the cosine expressions are reversed

Step-by-step explanation:

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