$\cot (45^\circ + \theta ) \cot (45^\circ - \theta ) = $

  • A
    $-1$
  • B
    $0$
  • C
    $1$
  • D
    $\infty $

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$\frac{3 + \cot 76^{\circ} \cot 16^{\circ}}{\cot 76^{\circ} + \cot 16^{\circ}}$ નું મૂલ્ય શોધો.

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નીચેનામાંથી કયું સાચું છે?

$\frac{\cos ^{2} 45^{\circ}}{\sin ^{2} 60^{\circ}}+\frac{\cos ^{2} 60^{\circ}}{\sin ^{2} 45^{\circ}}-\frac{\tan ^{2} 30^{\circ}}{\cot ^{2} 45^{\circ}}-\frac{\sin ^{2} 30^{\circ}}{\cot ^{2} 30^{\circ}}$ નું સંખ્યાત્મક મૂલ્ય શોધો.

$\cos^2 A(3 - 4\cos^2 A)^2 + \sin^2 A(3 - 4\sin^2 A)^2 = $

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