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Write the value of cos^(-1)(tan(3pi)/4) ...

Write the value of `cos^(-1)(tan(3pi)/4)` .

Text Solution

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Given,
`cos^(−1)(tan(3pi)/4​)`
`=cos^(−1)(tan(pi−(pi)/4))`
`=cos^(−1)(tan(−(pi)/4​))`
`=cos^(−1)(−tan(pi​)/4) ...
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