$\tan 5^{\circ} \cdot \tan 25^{\circ} \cdot \tan 45^{\circ} \cdot \tan 65^{\circ} \cdot \tan 85^{\circ}$ ની કિંમત $\ldots \ldots \ldots \ldots$ છે.

  • A
    $3$
  • B
    $2$
  • C
    $1$
  • D
    $0$

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$\sin \theta \cdot \cos (90^\circ - \theta) = \ldots \ldots \ldots$

$(1+\tan ^{2} \theta)(1-\cos ^{2} \theta) = \dots$

જો $\sin \theta + \sin^2 \theta = 1$ હોય,તો $\cos^2 \theta + \cos^4 \theta = \dots$

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ત્રિકોણમિતીય આંતર-સંબંધો માટે નીચેનામાંથી કઈ જોડી સાચી છે?
$1. \cos \theta$ $a. \frac{\cos \theta}{\sin \theta}$
$2. \tan \theta$ $b. \frac{1}{\csc \theta}$
$3. \cot \theta$ $c. \frac{1}{\sec \theta}$
$4. \sin \theta$ $d. \frac{1}{\cot \theta}$
$e. \sin \theta \cdot \cos \theta$

સાબિત કરો કે $\sqrt{\sec ^{2} \theta+\operatorname{cosec}^{2} \theta}=\tan \theta+\cot \theta$

Difficult
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