The following are all angle measures (in degrees, rounded to the nearest tenth) whose tangent is −44 .Which is the principal value of tan−1(−44) ?Choose 1 answer:(A) −448.7∘(B) −268.7∘(C) −88.7∘(D) 91.3∘
Q. The following are all angle measures (in degrees, rounded to the nearest tenth) whose tangent is −44 .Which is the principal value of tan−1(−44) ?Choose 1 answer:(A) −448.7∘(B) −268.7∘(C) −88.7∘(D) 91.3∘
Finding the Inverse Tangent Function: The principal value of an inverse tangent function, tan−1(x), is the value of θ in the range -90° < \theta < 90° that satisfies tan(θ)=x. Since we are looking for tan−1(−44), we need to find the angle whose tangent is −44 and lies within the specified range.
Using a Calculator or Computer: To find the principal value of tan−1(−44), we can use a calculator or a computer to compute the inverse tangent of −44. Remember that the calculator should be set to degree mode since the answers are given in degrees.
Calculating the Principal Value: Upon calculation, tan−1(−44) gives an angle of approximately −88.7 degrees. This falls within the principal range of -90° < \theta < 90°.
Determining the Final Answer: Therefore, the principal value of tan−1(−44) is −88.7 degrees, which corresponds to option (C).