If $\tan \theta = \frac{{20}}{{21}},$ cos$\theta$ will be
If $\tan \theta = \frac{{20}}{{21}},$ cos$\theta$ will be
- A
$ \pm \frac{{20}}{{41}}$
- B
$ \pm \frac{1}{{21}}$
- C
$ \pm \frac{{21}}{{29}}$
- D
$ \pm \frac{{20}}{{21}}$
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