The following are all angle measures (in radians, rounded to the nearest hundredth) whose tangent is −1.4 .Which is the principal value of tan−1(−1.4)?Choose 1 answer:(A) −4.09(B) −0.95(C) 2.19(D) 5.33
Q. The following are all angle measures (in radians, rounded to the nearest hundredth) whose tangent is −1.4 .Which is the principal value of tan−1(−1.4)?Choose 1 answer:(A) −4.09(B) −0.95(C) 2.19(D) 5.33
Determine angle in radians: To find the principal value of tan−1(−1.4), we need to determine the angle in radians whose tangent is −1.4 and lies in the range of the inverse tangent function, which is between −π/2 and π/2.
Calculate inverse tangent: Using a calculator or inverse tangent function, we calculate tan−1(−1.4). The calculator should be set to radians mode for this calculation.
Obtain calculated value: The calculator gives us the value of tan−1(−1.4) as approximately −0.9505 radians when rounded to the nearest hundredth.
Compare with options: Comparing the calculated value with the options given, we find that option (B) −0.95 is the closest to our calculated value and falls within the range of the inverse tangent function.
Identify principal value: Therefore, the principal value of tan−1(−1.4) is −0.95 radians, which corresponds to option (B).
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