Solve the equation for x if 0 < x < 2. Use a calculator to approximate all answers to the nearest hundr SOLUTION.) 4-4 tan(x + 3) = -12 X = X

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.6: Additional Trigonometric Graphs
Problem 59E
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Section 6.1 question 22
### Solving Trigonometric Equations

#### Problem Statement:
Solve the equation for \(x\) if \(0 \le x < 2\pi\). Use a calculator to approximate all answers to the nearest hundredth. 

#### Given Equation:
\[4 - 4 \tan(x + 3) = -12\]

#### Solution:
To solve for \( x \), follow these steps:

1. **Isolate the trigonometric function:**
   \[
   4 - 4 \tan(x + 3) = -12
   \]
   Subtract 4 from both sides of the equation:
   \[
   -4 \tan(x + 3) = -12 - 4
   \]
   Simplify the right side:
   \[
   -4 \tan(x + 3) = -16
   \]
   Divide both sides by -4:
   \[
   \tan(x + 3) = 4
   \]

2. **Use the arctangent function to find the angle:**
   \[
   x + 3 = \arctan(4)
   \]
   Using a calculator to find the arctangent of 4:
   \[
   x + 3 \approx 1.32 \, \text{radians}
   \]

3. **Solve for \( x \):**
   \[
   x = 1.32 - 3
   \]
   Simplify:
   \[
   x \approx -1.68 \, \text{radians}
   \]

Since the given domain is \(0 \le x < 2\pi\), we need to find a corresponding solution within this range. The value -1.68 radians can be converted to a positive equivalent within the specified range by adding \(2\pi\) (approximately 6.28):
   \[
   x \approx -1.68 + 2\pi
   \]
   \[
   x \approx -1.68 + 6.28
   \]
   \[
   x \approx 4.60 \, \text{radians}
   \]

Hence, the solution to the equation is:
   \[
   x \approx 4.60 \, \text{radians}
   \]

#### Note:
- The equation \(4 - 4 \tan(x
Transcribed Image Text:### Solving Trigonometric Equations #### Problem Statement: Solve the equation for \(x\) if \(0 \le x < 2\pi\). Use a calculator to approximate all answers to the nearest hundredth. #### Given Equation: \[4 - 4 \tan(x + 3) = -12\] #### Solution: To solve for \( x \), follow these steps: 1. **Isolate the trigonometric function:** \[ 4 - 4 \tan(x + 3) = -12 \] Subtract 4 from both sides of the equation: \[ -4 \tan(x + 3) = -12 - 4 \] Simplify the right side: \[ -4 \tan(x + 3) = -16 \] Divide both sides by -4: \[ \tan(x + 3) = 4 \] 2. **Use the arctangent function to find the angle:** \[ x + 3 = \arctan(4) \] Using a calculator to find the arctangent of 4: \[ x + 3 \approx 1.32 \, \text{radians} \] 3. **Solve for \( x \):** \[ x = 1.32 - 3 \] Simplify: \[ x \approx -1.68 \, \text{radians} \] Since the given domain is \(0 \le x < 2\pi\), we need to find a corresponding solution within this range. The value -1.68 radians can be converted to a positive equivalent within the specified range by adding \(2\pi\) (approximately 6.28): \[ x \approx -1.68 + 2\pi \] \[ x \approx -1.68 + 6.28 \] \[ x \approx 4.60 \, \text{radians} \] Hence, the solution to the equation is: \[ x \approx 4.60 \, \text{radians} \] #### Note: - The equation \(4 - 4 \tan(x
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