ધારો કે $a, b, c$ એ ત્રિકોણની બાજુઓ છે. જો $t$ એ પદાવલિ $\frac{a^2+b^2+c^2}{ab+bc+ca}$ દર્શાવે છે,તો $t$ ની તમામ શક્ય કિંમતોનો ગણ કયો છે?

  • A
    $\{x \in \mathbb{R} \mid x > 1\}$
  • B
    $\{x \in \mathbb{R} \mid 1 < x < 2\}$
  • C
    $\{x \in \mathbb{R} \mid 1 \leq x < 2\}$
  • D
    $\{x \in \mathbb{R} \mid 1 \leq x \leq 2\}$

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$\sqrt{3} \operatorname{cosec} 20^{\circ} - \sec 20^{\circ}$ ની કિંમત શોધો.

જો $\tan \left(\frac{\pi}{4}+\alpha\right)=\tan ^3\left(\frac{\pi}{4}+\beta\right)$ હોય,તો $\tan (\alpha+\beta) \cot (\alpha-\beta)=$

જો $\frac{\sin ^4 x}{2}+\frac{\cos ^4 x}{3}=\frac{1}{5}$ હોય,તો
$(A) \tan ^2 x=\frac{2}{3}$ $(B) \frac{\sin ^8 x}{8}+\frac{\cos ^8 x}{27}=\frac{1}{125}$
$(C) \tan ^2 x=\frac{1}{3}$ $(D) \frac{\sin ^8 x}{8}+\frac{\cos ^8 x}{27}=\frac{2}{125}$

જો $P = \sin \frac{2 \pi}{7} + \sin \frac{4 \pi}{7} + \sin \frac{8 \pi}{7}$ અને $Q = \cos \frac{2 \pi}{7} + \cos \frac{4 \pi}{7} + \cos \frac{8 \pi}{7}$ હોય,તો બિંદુ $(P, Q)$ એ કઈ ત્રિજ્યા ધરાવતા વર્તુળ પર આવેલું છે?

$\cos 2(\theta + \phi) - 4\cos (\theta + \phi)\sin \theta \sin \phi + 2\sin^2 \phi = $

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