Question

plz solve this question

Answer 1

Here
Take a= 35° and b= 10°

We know that
$\tan(a + b)= \tan(a) + \tan(b ) \div 1 - \tan(a) \tan( b )$
$\tan(35+10)=\tan(35)+\tan(10) \div 1-\tan(35)\tan(10)$

$1 =\tan(35) +\tan(10)\div1- \tan(35)\times\tan(10)$
$\tan(35) + \tan(10) + \tan(35) \times \tan(10) = 1$
L. H. S = R. H. S

Hope this will help you...