Question

Hey mates!!!

If
$\tan(a) = \frac{20}{21}$
Show that
$\frac{1 - \sin(a) + \cos(a) }{1 + \cos(a) + \sin(a) } = \frac{3}{7}$
Please explain​

Answer 1

Answer:

hence proven 3/7=3/7

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