교과서 질문
In Exercises 39–48, use a calculator to find the value of the trigonometric function to four decimal places.
tan 32.7°
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Ch. 1 - Angles and the Trigonometric Functions
Blitzer3rd EditionTrigonometryISBN: 9780137316601
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Table of contents
1장, 문제 41
In Exercises 41–56, use the circle shown in the rectangular coordinate system to draw each angle in standard position. State the quadrant in which the angle lies. When an angle's measure is given in radians, work the exercise without converting to degrees.
7𝜋/6
검증된 단계별 안내1
Understand that the angle is given in radians as \(\frac{7\pi}{6}\), which means the angle is measured counterclockwise from the positive x-axis.
Recall that \(\pi\) radians corresponds to 180 degrees, so \(\frac{7\pi}{6}\) is slightly more than \(\pi\) (180 degrees), specifically \(\pi + \frac{\pi}{6}\).
Since \(\pi\) radians points directly to the negative x-axis, adding \(\frac{\pi}{6}\) radians (30 degrees) moves the terminal side of the angle into the third quadrant.
Draw the angle starting from the positive x-axis, rotating counterclockwise past \(\pi\) radians, and stopping at \(\frac{7\pi}{6}\) radians, which lies in the third quadrant.
State that the angle \(\frac{7\pi}{6}\) lies in the third quadrant.
비슷한 문제에 대한 검증된 영상 답변:
이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
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주요 개념
질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.
Angles in Standard Position
An angle is in standard position when its vertex is at the origin of the coordinate system and its initial side lies along the positive x-axis. The terminal side is determined by rotating the initial side counterclockwise for positive angles and clockwise for negative angles.
추천 영상:
05:50
Drawing Angles in Standard Position
Radian Measure of Angles
Radians measure angles based on the radius of a circle. One full rotation around a circle is 2π radians. Angles can be expressed as multiples or fractions of π, which allows direct use in trigonometric functions without converting to degrees.
추천 영상:
5:04Converting between Degrees & Radians
Quadrants in the Coordinate Plane
The coordinate plane is divided into four quadrants by the x- and y-axes. The quadrant in which an angle's terminal side lies depends on the angle's measure. For example, an angle between π and 3π/2 radians lies in the third quadrant.
추천 영상:
6:36Quadratic Formula
관련 실천
교과서 질문
Find the reference angle for each angle.
5π/4
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교과서 질문
In Exercises 35–60, find the reference angle for each angle.
7𝜋/4
710
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교과서 질문
In Exercises 41–43, find the exact value of each of the remaining trigonometric functions of θ.
cos θ = 2/5, sin θ < 0
942
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교과서 질문
In Exercises 33–42, let sin t = a, cos t = b, and tan t = c. Write each expression in terms of a, b, and c.
cos t + cos(t + 1000𝜋) - tan t - tan(t + 999𝜋) - sin t + 4 sin(t - 1000𝜋)
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교과서 질문
In Exercises 35–40, convert each angle in radians to degrees. Round to two decimal places.
-5.2 radians
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