Math Problem Statement

Write the following expression as a single trigonometric function or a power of a trigonometric function: (csc β * tan β) / sec β. Choose the correct answer from the options provided.

Solution

Let's solve the problem step-by-step.

The given expression is: cscβtanβsecβ\frac{\csc \beta \cdot \tan \beta}{\sec \beta}

Step 1: Rewrite in terms of sine and cosine

Let's rewrite each trigonometric function in terms of sinβ\sin \beta and cosβ\cos \beta:

  1. cscβ=1sinβ\csc \beta = \frac{1}{\sin \beta}
  2. tanβ=sinβcosβ\tan \beta = \frac{\sin \beta}{\cos \beta}
  3. secβ=1cosβ\sec \beta = \frac{1}{\cos \beta}

Substituting these into the expression, we get: 1sinβsinβcosβ1cosβ\frac{\frac{1}{\sin \beta} \cdot \frac{\sin \beta}{\cos \beta}}{\frac{1}{\cos \beta}}

Step 2: Simplify the expression

Now, simplify by multiplying the terms in the numerator and dividing by the denominator: =sinβsinβcosβ1cosβ= \frac{\frac{\sin \beta}{\sin \beta \cdot \cos \beta}}{\frac{1}{\cos \beta}}

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Math Problem Analysis

Mathematical Concepts

Trigonometric Identities
Simplification

Formulas

csc β = 1 / sin β
tan β = sin β / cos β
sec β = 1 / cos β

Theorems

Trigonometric identity simplification

Suitable Grade Level

High School