Thursday, 27 April 2023

Prove that 1/2cos^-1(1-x)/(1+x)=tan^-1√x.



 

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If find x. 1/(9!) + 1/(10!) = x/(11!).

  Here n! is read as n factorial. It can be written as n(n-1)! or n(n-1)(n-1)!