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Find the principal values of cot^(-1)sqr...

Find the principal values of `cot^(-1)sqrt(3)` and `cot^(-1)(-1)`

Text Solution

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Let `y=cos^(-1)(sqrt3)`
`rArr coty=(sqrt3)`
`:'` The principal of `cot^(-1)x"is"(0,pi)` and in this interval `cot.pi/6=sqrt3`
`:.cot^(-1)(sqrt3)=pi/6`1
`:.` The principal value of `cot^(-1)(sqrt3)" is " pi/6`
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