જો $\cos ^{2} x+\cos ^{4} x=1$ હોય,તો $\tan ^{2} x+\tan ^{4} x=?$

  • A
    $0$
  • B
    $1$
  • C
    $2 \tan ^{2} x$
  • D
    $2 \tan ^{4} x$

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જો $x = \sin 130^\circ \cos 80^\circ$,$y = \sin 80^\circ \cos 130^\circ$,અને $z = 1 + xy$ હોય,તો નીચેનામાંથી કયું સાચું છે?

$\cos y \cos \left( \frac{\pi}{2} - x \right) - \cos \left( \frac{\pi}{2} - y \right) \cos x + \sin y \cos \left( \frac{\pi}{2} - x \right) + \cos x \sin \left( \frac{\pi}{2} - y \right)$ ની કિંમત શૂન્ય થાય,જો

જો $\tan \theta + \cot \theta = 5$ હોય,તો $\tan^2 \theta + \cot^2 \theta$ ની કિંમત કેટલી થાય?

$\cos 20^\circ \cos 40^\circ \cos 80^\circ = $

જો $A = \sin^2 x + \cos^4 x$ હોય,તો તમામ વાસ્તવિક $x$ માટે :

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