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If sec theta = (5)/(3) and 0 lt theta lt...

If `sec theta = (5)/(3) and 0 lt theta lt (pi)/(2)`. Find all the other T-ratios.

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To solve the problem, we will use the information given about the secant function and the properties of a right triangle. ### Step-by-Step Solution: 1. **Understanding Secant**: We know that secant (sec) is defined as the reciprocal of cosine (cos). Therefore, if \( \sec \theta = \frac{5}{3} \), then: \[ \cos \theta = \frac{1}{\sec \theta} = \frac{3}{5} \] 2. **Drawing a Right Triangle**: We can visualize this with a right triangle where: - The adjacent side (base) to angle \( \theta \) is 3. - The hypotenuse is 5. 3. **Finding the Opposite Side**: To find the length of the opposite side (perpendicular), we can use the Pythagorean theorem: \[ \text{hypotenuse}^2 = \text{adjacent}^2 + \text{opposite}^2 \] Plugging in the values: \[ 5^2 = 3^2 + \text{opposite}^2 \] \[ 25 = 9 + \text{opposite}^2 \] \[ \text{opposite}^2 = 25 - 9 = 16 \] \[ \text{opposite} = 4 \] 4. **Finding Other Trigonometric Ratios**: Now that we have all sides of the triangle, we can find the other trigonometric ratios: - **Sine**: \[ \sin \theta = \frac{\text{opposite}}{\text{hypotenuse}} = \frac{4}{5} \] - **Tangent**: \[ \tan \theta = \frac{\text{opposite}}{\text{adjacent}} = \frac{4}{3} \] - **Cosecant** (csc): \[ \csc \theta = \frac{1}{\sin \theta} = \frac{5}{4} \] - **Cotangent** (cot): \[ \cot \theta = \frac{1}{\tan \theta} = \frac{3}{4} \] 5. **Summary of All Trigonometric Ratios**: - \( \sin \theta = \frac{4}{5} \) - \( \cos \theta = \frac{3}{5} \) - \( \tan \theta = \frac{4}{3} \) - \( \csc \theta = \frac{5}{4} \) - \( \sec \theta = \frac{5}{3} \) - \( \cot \theta = \frac{3}{4} \)

To solve the problem, we will use the information given about the secant function and the properties of a right triangle. ### Step-by-Step Solution: 1. **Understanding Secant**: We know that secant (sec) is defined as the reciprocal of cosine (cos). Therefore, if \( \sec \theta = \frac{5}{3} \), then: \[ \cos \theta = \frac{1}{\sec \theta} = \frac{3}{5} ...
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Knowledge Check

  • If sin theta = - (12)/(13) and pi lt theta lt (3pi)/(2) , then the values of sec theta is

    A
    `(13)/(5)`
    B
    `-(13)/(5)`
    C
    `-(12)/(13)`
    D
    None of these
  • If sin theta = - (12)/(13) and pi lt theta lt (3pi)/(2), then the value of sec theta is

    A
    `(13)/(5)`
    B
    `- (13)/(5)`
    C
    `- (12)/(13)`
    D
    None of these
  • If cos theta = (-3)/(5) and pi lt theta lt (3pi)/(2) , then find the value of (sec theta - tan theta)/( cosec theta + cot theta) is-

    A
    6
    B
    8
    C
    `-2`
    D
    `-4`
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