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Introduction to Trigonometry

CH08 Question Bank

CBSE_CH08_QUESTION_BANK

Grade 10

Question:

$\text{cosec}\,\theta$ is defined as:

$\dfrac{1}{\sin\theta}$
$\dfrac{1}{\cos\theta}$
$\dfrac{1}{\tan\theta}$
$\sin\theta$

Step-by-Step Solution

Key Concept: Recall the reciprocal relationships between the trigonometric ratios.

By definition, $\text{cosec}\,\theta=\dfrac{1}{\sin\theta}$. [1.0 Mark]

Correct Answer: $\dfrac{1}{\sin\theta}$

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