If cot^(-1)((1)/(7))=theta, find the val...

If `cot^(-1)((1)/(7))=theta,` find the value of `costheta.`

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SURA PUBLICATION-MODAL QUESTION PAPER-PART - IV

If 2+iand3-sqrt2 are the roots of the equation x^(6)-13x^(5)+62x^(4)-1...
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If cot^(-1)((1)/(7))=theta, find the value of costheta.
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Solve the following systems of linear equation by Cramer's rule: 3x...
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