Question

Show that: tan 3x tan 2x tan x = tan3x − tan 2x − tan x

Answer 1

So , the answer is here

3x=2x+x 

Taking tan on both sides

tan3x = tan (2x+x)

tan3x = (tan2x+tanx)/1-tan2x tanx
(1-tan2x tanx)tan3x = tan2x+tanx

tan3x - tanx tan2x tan3x = tan2x+tanx

tanx tan2x tan3x = tan3x-tan2x-tanx

Hence it is proved..

hope it helps

Answer 2

Step-by-step explanation:

all explanation in above image☝️