જો $\tan \theta + \cot \theta = 2$ અને $0^{\circ} < \theta < 90^{\circ}$ હોય,તો $\theta$ નું મૂલ્ય $(\text{in } ^{\circ})$ કેટલું થાય?

  • A
    $60$
  • B
    $75$
  • C
    $30$
  • D
    $45$

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જો $\tan A = \frac{1}{2}$ હોય,તો $\tan 3A = $

$\cos ^{2} 5^{\circ}+\cos ^{2} 10^{\circ}+\cos ^{2} 15^{\circ}+\cdots+\cos ^{2} 90^{\circ}=$

$\tan 75^\circ - \cot 75^\circ = $

જો $\cot \theta + \tan \theta = m$ અને $\sec \theta - \cos \theta = n$ હોય,તો નીચેનામાંથી કયું સાચું છે?

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$\sin 12^\circ \sin 48^\circ \sin 54^\circ = $

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