The following are all angle measures (in degrees, rounded to the nearest tenth) whose tangent is 2.6 .Which is the principal value of arctan(2.6) ?Choose 1 answer:(A) −111.0∘(B) 69.0∘(C) 249.0∘(D) 429.0∘
Q. The following are all angle measures (in degrees, rounded to the nearest tenth) whose tangent is 2.6 .Which is the principal value of arctan(2.6) ?Choose 1 answer:(A) −111.0∘(B) 69.0∘(C) 249.0∘(D) 429.0∘
Definition of arctan function: The principal value of the arctan function is the value of the angle in the range of −90 degrees to 90 degrees that corresponds to a given tangent value.
Calculate arctan(2.6): Calculate the principal value of arctan(2.6) using a calculator or trigonometric tables to find the angle whose tangent is 2.6.Principal value of arctan(2.6)≈69.0 degrees (rounded to the nearest tenth).
Check given options: Check the given options to find the one that matches the calculated principal value.(A) −111.0 degrees is not in the range of −90 to 90 degrees.(B) 69.0 degrees is in the range of −90 to 90 degrees and matches our calculated value.(C) 249.0 degrees is not in the range of −90 to 90 degrees.(D) 429.0 degrees is not in the range of −90 to 90 degrees.
Select correct answer: Select the correct answer based on the principal value range and the calculated value.The correct answer is (B) 69.0 degrees.
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