Question

Tan 35° + tan 10° + tan 35° × tan 10° = 1

Answer 1

Answer:

Step-by-step explanation:

tan35 +tan10= tan(35+10) *(1-tan35 tan10)=1-tan35 tan10

=1- tan35 tan10 +tan35 tan 10= 1

Answer 2

Answer:

So we have to prove this -----------

Step-by-step explanation:

tan(45)=1 ;

so

tan(35+10) = 1 ;

So using tan(a+b)= tana + tan b/ 1-tana*tanb;

tan35 + tan 10 / 1-tan35*tan10 = 1;

tan 35 + tan 10 = 1(1-tan35*tan10);

tan35 + tan 10 + tan 35 * tan 10 = 1 ;

Hence Proved........