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Form the differeential equation of the family of circles having radii 3.
cbse
class12
modelpaper
2012
sec-b
q18
math
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Dec 25, 2012
by
thanvigandhi_1
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Prove that \( tan^{-1} \bigg(\frac{\large 1}{\large 4} \bigg) + tan^{-1} \bigg( \frac{\large 2}{\large 9} \bigg ) = \frac{\large 1}{\large 2} cos^{-1} \bigg( \frac{3}{5} \bigg). \)
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