જો $A=35^{\circ}, B=15^{\circ}$ અને $C=40^{\circ}$ હોય,તો $\tan A \cdot \tan B+\tan B \cdot \tan C+\tan C \cdot \tan A$ ની કિંમત શોધો.

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

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$\cos^2 48^{\circ} - \sin^2 12^{\circ}$ ની કિંમત શોધો,જો $\sin 18^{\circ} = \frac{\sqrt{5}-1}{4}$ હોય.

જો $\tan A = -\frac{1}{2}$ અને $\tan B = -\frac{1}{3}$ હોય,તો $A + B = $

જો $\tan A + \tan B = x$ અને $\cot A + \cot B = y$ હોય,તો $\tan (A + B) =$

$\cos ^{2} 45^{\circ}-\sin ^{2} 15^{\circ}$ નું મૂલ્ય શું છે?

જો $m \cos (\alpha+\beta)-n \cos (\alpha-\beta)=m \cos (\alpha-\beta)+n \cos (\alpha+\beta)$ હોય,તો $\tan \alpha \tan \beta=$

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