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[" 9.Prove that: "],[[" (i) "cos^(-1)(4)...

[" 9.Prove that: "],[[" (i) "cos^(-1)(4)/(5)=tan^(-1)(3)/(4)," 4"]]

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cos^-1(4/5)+tan^-1(3/5)=

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Prove that sin ^(-1).(3)/(5) = tan ^(-1) .(3)/(4) .

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tan [cos^(-1)((4)/(5)) +tan ^(-1)((2)/(3))]=....