Math Problem Statement

Draw the angle in standard position. State the quadrant in which the angle lies. Work the exercise without converting to degrees.

negative StartFraction 5 pi Over 3 EndFraction−5π3

Question content area bottom

Part 1

Choose the correct graph below.

A.

B.

C.

D.

Part 2

The angle is in quadrant

I.

IV.

II.

III.

I.

Solution

Let's break this down step by step to determine the graph and the quadrant for the angle 5π3-\frac{5\pi}{3}.

Step 1: Determine the angle's direction

The angle is negative, which means it is measured clockwise starting from the positive x-axis. To understand where this angle lies, we need to find a positive coterminal angle.

Step 2: Find the positive coterminal angle

A coterminal angle is found by adding 2π2\pi (which is a full circle) to the given angle. In this case, we'll add 2π2\pi to 5π3-\frac{5\pi}{3}:

5π3+2π=5π3+6π3=π3- \frac{5\pi}{3} + 2\pi = -\frac{5\pi}{3} + \frac{6\pi}{3} = \frac{\pi}{3}

So, the positive coterminal angle is π3\frac{\pi}{3}.

Step 3: Identify the quadrant

Since π3\frac{\pi}{3} is a positive angle less than π2\frac{\pi}{2}, it lies in Quadrant I.

However, the original angle 5π3-\frac{5\pi}{3} is a negative rotation. We can conclude that it wraps clockwise and lands in Quadrant IV, because adding the full circle leads us to a coterminal angle in Quadrant I.

Part 2: The angle is in Quadrant IV.

Would you like to see a visual representation or further clarifications?

Five Related Questions:

  1. What is a coterminal angle, and how is it calculated?
  2. How do you convert between radians and degrees?
  3. What is the significance of the reference angle in quadrant determination?
  4. How do you determine the quadrant of a negative angle?
  5. What is the relationship between positive and negative angles?

Tip: Always check for coterminal angles to simplify the quadrant determination process!

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Math Problem Analysis

Mathematical Concepts

Angles in Standard Position
Quadrants

Formulas

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Theorems

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Suitable Grade Level

High School