Question

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Answer 1

$\frac{ \sin(x) }{ { \cos }^{3}(x) } + \frac{ \cos(x) }{ { \sin }^{3}(x) }$

$tanx. { \sec }^{2} x + cotx. { \csc }^{2}x$

$k(1 + {k}^{2}) + \frac{1}{k} (1 + \frac{1} { {k}^{2} } )$

$k(1 + {k}^{2} ) + \frac{ ({k}^{2} + 1 )}{ {k}^{3} }$

$({k}^{2} + 1)(k + \frac{1}{ {k}^{3} } )$

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