Which of the following statements is not true concerning radian​ measure? Select the correct choice below.

A. An angle in standard position having a radian measure of theta equals negative StartFraction 5 pi Over 3 EndFraction has a terminal side that lies in Quadrant I.
B. An angle in standard position having a radian measure of theta equals negative StartFraction 11 pi Over 6 EndFraction has a terminal side that lies in Quadrant IV.
C. One radian is the measure of a central angle that has an intercepted arc equal in length to the radius of the circle.
D. One radian is approximately 57.3 degrees.

Respuesta :

Answer:

B

Step-by-step explanation:

Let's examine and comment on each alternative.

A. An angle with a measure of [tex]\frac{-5\pi }{3} rad[/tex] which is equivalent to -300º, will be traced in a clockwise way. As shown in the picture below. So the endpoint stops in the Quadrant I. True

B. Since [tex]\frac{-11\pi }{6}[/tex] rad is also equivalent to -330º, it has a negative orientation which tells us that it will be traced in a clockwise way as well. But its endpoint will lie on Quadrant I. Not on Quadrant IV as the B affirms.

So the B item is False.

C. Keep in mind, that Radian is a unit of measurement taken when you have an arc subtended from a unit circle with arc length 1

As shown in the picture below. True

D. If you consider the 1 Circle and its circunference, which is 2[tex]\pi[/tex], (360º) we can just make this simple division:

[tex]\frac{360}{2\pi } =\frac{180}{\pi }[/tex] = 180º/3.1415.. ≅ 57.3º   True

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