Q. 114.2( 5 Votes )

Prove that : <spa

Answer :

Given: an expression is given


To prove:


we will consider the LHS first, so



Now we know,



Substituting this value in equation (ii), we get







Now we know,



Substituting this value in equation (ii), we get






LHS=tan-1(1)


We know So the above equation becomes



Hence LHS=RHS


Therefore


Hence proved


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