Math Problem Statement

cot x = -12 how to find the values

Solution

To solve the equation cot(x)=12\cot(x) = -12, we need to express cot(x)\cot(x) in terms of trigonometric functions we are more familiar with.

Step 1: Recall the cotangent identity

The cotangent function is the reciprocal of the tangent function, so: cot(x)=1tan(x)\cot(x) = \frac{1}{\tan(x)} Thus, the equation becomes: 1tan(x)=12\frac{1}{\tan(x)} = -12 This simplifies to: tan(x)=112=112\tan(x) = \frac{1}{-12} = -\frac{1}{12}

Step 2: Find the angle xx

To find xx, we take the inverse tangent (or arctangent) of 112-\frac{1}{12}. In other words: x=tan1(112)x = \tan^{-1}\left(-\frac{1}{12}\right) Using a calculator: x4.76x \approx -4.76^\circ

Step 3: Find all possible solutions

Since the tangent function is periodic with a period of π\pi radians (or 180°), the general solution for xx will be: x = -4.76^\circ + 180^\circ n \quad \text{(for any integer n)} or in radians: x = -0.083 \, \text{radians} + \pi n \quad \text{(for any integer n)}

Final Answer:

The values of xx that satisfy cot(x)=12\cot(x) = -12 are approximately: x \approx -4.76^\circ + 180^\circ n \quad \text{(for any integer n)} or x \approx -0.083 \, \text{radians} + \pi n \quad \text{(for any integer n)}

Would you like to see a graphical representation or any more details on solving trigonometric equations?


Here are 5 related questions you could explore next:

  1. What is the solution for tan(x)=12\tan(x) = 12?
  2. How do we solve trigonometric equations with multiple functions involved?
  3. What is the difference between solving for cot(x)\cot(x) and tan(x)\tan(x)?
  4. How does the periodicity of trigonometric functions affect their solutions?
  5. What are some common applications of trigonometric equations in real-world problems?

Tip: When solving trigonometric equations, always consider the periodic nature of trigonometric functions, as they often have infinite solutions based on their periodicity.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Trigonometry
Cotangent
Tangent
Inverse Trigonometric Functions
Periodic Functions

Formulas

cot(x) = 1/tan(x)
tan(x) = -1/12
x = tan^(-1)(-1/12)
x = -4.76° + 180°n
x = -0.083 radians + πn

Theorems

Reciprocal Identity for Cotangent
Periodicity of Tangent and Cotangent Functions

Suitable Grade Level

Grades 9-12