Math Problem Statement

What is sec theta= 2.445

Solution

The equation sec(θ)=2.445\sec(\theta) = 2.445 can be solved for θ\theta by finding the inverse of the secant function. Recall that:

sec(θ)=1cos(θ)\sec(\theta) = \frac{1}{\cos(\theta)}

So, if sec(θ)=2.445\sec(\theta) = 2.445, we have:

cos(θ)=12.445\cos(\theta) = \frac{1}{2.445}

Now, let's calculate this:

cos(θ)=0.4089\cos(\theta) = 0.4089

To find θ\theta, take the inverse cosine (cos1\cos^{-1}) of 0.4089:

θ=cos1(0.4089)\theta = \cos^{-1}(0.4089)

Using a calculator, we get:

θ66.0 or 1.152radians\theta \approx 66.0^\circ \text{ or } 1.152 \, \text{radians}

Since secant is periodic, there are multiple possible solutions. The general solution for θ\theta can be written as:

θ=66+360norθ=294+360n\theta = 66^\circ + 360^\circ n \quad \text{or} \quad \theta = 294^\circ + 360^\circ n

where nn is any integer.

Would you like further details or a breakdown of the steps?

Here are 5 related questions:

  1. How do you find the secant of an angle?
  2. What is the relationship between secant and cosine?
  3. How does the periodicity of the secant function affect solutions?
  4. What is the general solution for trigonometric equations?
  5. How do you convert between degrees and radians?

Tip: Always remember to consider all possible solutions when solving trigonometric equations due to their periodic nature.

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Math Problem Analysis

Mathematical Concepts

Trigonometry
Secant Function
Cosine Function
Inverse Trigonometric Functions

Formulas

sec(θ) = 1 / cos(θ)
θ = cos^(-1)(1 / sec(θ))

Theorems

Inverse Function Theorem for Trigonometric Functions
Periodicity of Trigonometric Functions

Suitable Grade Level

Grades 10-12