Use a calculator to approximate each value in decimal degrees.
θ = tan⁻¹ (-7.7828641)

검증된 단계별 안내

Recognize that the problem asks for the angle \( \theta \) such that \( \tan(\theta) = -7.7828641 \), and that \( \theta = \tan^{-1}(-7.7828641) \) represents the inverse tangent (arctangent) function.

Recall that the inverse tangent function \( \tan^{-1}(x) \) returns an angle in radians or degrees depending on the calculator mode, so ensure your calculator is set to degree mode to get the answer in decimal degrees.

Enter the value \(-7.7828641\) into the calculator and then press the inverse tangent function key (usually labeled as \( \tan^{-1} \) or \( \arctan \)) to find \( \theta \).

Interpret the result from the calculator as the principal value of \( \theta \), which will be an angle between \(-90^\circ\) and \(90^\circ\) because the range of \( \tan^{-1} \) is \( (-90^\circ, 90^\circ) \).

If needed, consider the context or quadrant of the angle based on the sign of the tangent value, but since the problem only asks for the approximate decimal degree value, the calculator output is sufficient.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

도움이 되었나요?

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Inverse Tangent Function (tan⁻¹ or arctan)

The inverse tangent function returns the angle whose tangent is a given number. It is used to find an angle when the ratio of the opposite side to the adjacent side in a right triangle is known. The output is typically in radians or degrees, depending on the calculator settings.

Calculator Mode and Angle Units

Calculators can operate in different angle modes, commonly degrees or radians. To correctly interpret the inverse tangent result in decimal degrees, ensure the calculator is set to degree mode. This setting affects the numerical output of trigonometric functions.

Decimal Degree Approximation

Decimal degrees express angles as a decimal number rather than degrees, minutes, and seconds. This format simplifies calculations and is commonly used in scientific and engineering contexts. Approximating the angle in decimal degrees involves evaluating the inverse tangent and converting if necessary.

Use a calculator to approximate each value in decimal degrees.θ = tan⁻¹ (-7.7828641)