Question

prove that tan-¹2x + tan-¹3x = π/4​

Answer 1

Step-by-step explanation:

tanx=tan(2x−x)=1+tan2xtanxtan2x−tanx  

∴T1=tan2xtanx=cotx(tan2x−tan1)−1 

∴T2=cotx(tan3x−tan2x)−1  etc.

∴Sn=cotx[tan(n+1)x−tanx]−n

=cotxtan(n+1)x−1−n 

Answer 2

Answer:

OK..... thx..... for following me..... is it your 2nd id