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प्रश्न
For the principal value, evaluate the following:
`tan^-1sqrt3-sec^-1(-2)`
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उत्तर
`tan^-1sqrt3-sec^-1(-2)=tan^-1(tan pi/3)-sec^-1(sec (2pi)/3)`
`=pi/3-(2pi)/3`
`=-pi/3`
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