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tan^(-1).(x(x+1)+1)/((x+1)-x) =tan^(-...

`tan^(-1).(x(x+1)+1)/((x+1)-x)`
`=tan^(-1) (x^(2) +x^+1)`
= R.H.S

Text Solution

Verified by Experts

`sin.(7pi)/(4) = sin (2pi -(pi)/(4))= -sin .(pi)/(4)= - (1)/sqrt(2)`
`therefore sin^(-1)(sin .(7pi)/(4)) = sin^(-1) (sin.(pi)/(4)) = - (pi)/(4)`
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