જો $\tan A+\tan B+\cot A+\cot B=\tan A \tan B-\cot A \cot B$ અને $0^{\circ} < A+B < 270^{\circ}$ હોય,તો $A+B=$ ($^{\circ}$ માં)

  • A
    $45$
  • B
    $135$
  • C
    $150$
  • D
    $225$

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ધારો કે $\alpha = \frac{1}{\sin 60^{\circ} \sin 61^{\circ}} + \frac{1}{\sin 62^{\circ} \sin 63^{\circ}} + \dots + \frac{1}{\sin 118^{\circ} \sin 119^{\circ}}$. તો $\left(\frac{\operatorname{cosec} 1^{\circ}}{\alpha}\right)^2$ ની કિંમત $....$ છે.

જો $A$ અને $B$ ધન લઘુકોણ હોય જે $3 \cos^2 A + 2 \cos^2 B = 4$ અને $\frac{3 \sin A}{\sin B} = \frac{2 \cos B}{\cos A}$ નું સમાધાન કરે છે,તો $A + 2B =$ ($^{\circ}$ માં)

$\sqrt{3} \csc 20^{\circ} - \sec 20^{\circ} = $

જો $\frac{\sin^4 x}{2} + \frac{\cos^4 x}{3} = \frac{1}{5}$ હોય,તો $27 \sec^6 x + 8 \operatorname{cosec}^6 x = $

જો $\theta+\phi=\alpha$ અને $\tan \theta=k \tan \phi$ (જ્યાં $k>1$) હોય,તો $\sin (\theta-\phi)$ નું મૂલ્ય શું થાય?

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