त्रिकोणमितीय अंतर्संबंधों के लिए निम्नलिखित में से कौन सा युग्म सही है?
$1. \cos \theta$ $a. \frac{\cos \theta}{\sin \theta}$
$2. \tan \theta$ $b. \frac{1}{\csc \theta}$
$3. \cot \theta$ $c. \frac{1}{\sec \theta}$
$4. \sin \theta$ $d. \frac{1}{\cot \theta}$
$e. \sin \theta \cdot \cos \theta$

  • A
    $(1-e), (2-b), (3-c), (4-d)$
  • B
    $(1-d), (2-e), (3-b), (4-a)$
  • C
    $(1-b), (2-a), (3-e), (4-d)$
  • D
    $(1-c), (2-d), (3-a), (4-b)$

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यदि $\operatorname{cosec} A = \sqrt{10}$ है,तो $\sin A = \dots$

$\sin 60^{\circ} \sin 45^{\circ} + \cos 60^{\circ} \cos 45^{\circ} = \ldots \ldots \ldots \ldots$

यदि $\sin \alpha = \frac{1}{2}$ और $\cos \beta = \frac{1}{2}$ है,तो $(\alpha + \beta)$ का मान क्या होगा ($^{\circ}$ में)?

यदि $\sec \theta = 1$ है,तो $\theta = \ldots \ldots \ldots$ ($^{\circ}$ में)

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