$(\sin \theta+\cos \theta)^{2}+(\sin \theta-\cos \theta)^{2} = \dots$

  • A
    $4 \sin \theta \cos \theta$
  • B
    $2$
  • C
    $1$
  • D
    $0$

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$\sin^{2} 60^{\circ} - \tan 45^{\circ} + \cos^{2} 30^{\circ} - \cot 90^{\circ} = \ldots$

$2 \sin ^{2} 30^{\circ} \cot 30^{\circ}-3 \cos ^{2} 60^{\circ} \sec ^{2} 30^{\circ} = \dots$

જો $\sin \theta + 2 \cos \theta = 1$ આપેલ હોય,તો સાબિત કરો કે $2 \sin \theta - \cos \theta = 2$.

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જો $\sin \theta + \cos \theta = \sqrt{3}$ હોય,તો સાબિત કરો કે $\tan \theta + \cot \theta = 1$.

$0^{\circ} < \theta < 90^{\circ}$ માટે,જેમ $\theta$ નું મૂલ્ય $0^{\circ}$ થી $90^{\circ}$ સુધી વધે છે,તેમ $\ldots \ldots \ldots \ldots$ નું મૂલ્ય વધે છે.

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