Math Problem Statement

Write the first trigonometric function tan(θ) in terms of the second trigonometric function sec(θ).

Solution

The problem asks to express the tangent function tan(θ)\tan(\theta) in terms of the secant function sec(θ)\sec(\theta), and it offers several multiple-choice answers.

Step-by-Step Solution

We know from trigonometric identities that: tan(θ)=±sec2(θ)1\tan(\theta) = \pm \sqrt{\sec^2(\theta) - 1}

This identity comes from the Pythagorean identity: tan2(θ)+1=sec2(θ)\tan^2(\theta) + 1 = \sec^2(\theta) Rearranging, we get: tan2(θ)=sec2(θ)1\tan^2(\theta) = \sec^2(\theta) - 1 Taking the square root on both sides gives: tan(θ)=±sec2(θ)1\tan(\theta) = \pm \sqrt{\sec^2(\theta) - 1}

Conclusion

The correct answer is therefore: ±sec2(θ)1\boxed{\pm \sqrt{\sec^2(\theta) - 1}} This corresponds to option B in the choices provided.

Would you like further explanation on how the identity was derived or details about tangent and secant relationships?


Related Questions

  1. What is the relationship between sec(θ)\sec(\theta) and cos(θ)\cos(\theta)?
  2. How can we express sin(θ)\sin(\theta) in terms of sec(θ)\sec(\theta)?
  3. What are other Pythagorean identities involving trigonometric functions?
  4. How do we handle the ±\pm sign in trigonometric identities?
  5. What is the definition of the tangent function in terms of sine and cosine?

Tip

Remember that the square root introduces a ±\pm symbol, so it's important to consider the quadrant where θ\theta is located to determine the correct sign in trigonometric functions.

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Math Problem Analysis

Mathematical Concepts

Trigonometry
Trigonometric Identities

Formulas

tan(θ) = ±√(sec^2(θ) - 1)

Theorems

Pythagorean Identity

Suitable Grade Level

High School (Grades 9-12)