જો $\tan \theta = \frac{20}{21}$ હોય,તો $\cos \theta$ શું થશે?

  • A
    $\pm \frac{20}{41}$
  • B
    $\pm \frac{1}{21}$
  • C
    $\pm \frac{21}{29}$
  • D
    $\pm \frac{20}{21}$

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Similar Questions

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

ત્રિકોણમિતીય વિધેય $\tan \frac{19 \pi}{3}$ ની કિંમત શોધો.

નીચે આપેલા અંશ માપને અનુરૂપ રેડિયન માપ શોધો: $240^{\circ}$

સાબિત કરો કે:
$2 \sin ^{2} \frac{\pi}{6}+\csc ^{2} \frac{7 \pi}{6} \cos ^{2} \frac{\pi}{3}=\frac{3}{2}$

જો $\cos(\alpha + \beta) = 0$ હોય,તો $\sin(\alpha + 2\beta) =$

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