Question

if tan^-1x + tan^-1y + tan^-1z= pi or pi/2
then prove x+y+z=xyz or
xy +yz+zx=1

Answer 1

dude i got this one

Answer 2

tan inverse let me write it as arctan ( for ease)-
so arctan x +arctan y =arctan(x+y/1-xy)
arctan(x+y/1-xy) + arctan z = arctan (x+y+z - xyz/ 1- xy - zx - zy);
if tan pi = 0;
therefore numerator = 0 solve; you will get it;
tan pie/2 = infinity, denominator = 0; sove it and you will get it;

Answer 3

got it?

Answer 4

what is arc tan

Answer 5

tan inverse is also called as arctan da.

Answer 6

what about other questions

Answer 7

still trying and asking