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[quad =sin^(-1)1=(pi)/(2)=R.H.S],[" Ex."...

[quad =sin^(-1)1=(pi)/(2)=R.H.S],[" Ex."16." Fift "(1)/(8)" if "f_(5)" (Prove that) "4tan^(-1)(1)/(5)-tan^(-1)(1)/(70)+tan^(-1)(1)/(99)=(pi)/(4)],[(pi)/(60):(1)/(4197)(4)/(9000)]

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