Question

pls answer this question​

Answer 1

$( { (\sin\theta )}^{2} + \frac{1}{1 + { (\tan\theta) }^{2} } ) \\ \implies \: ( \: { (\sin\theta) }^{2} + \frac{1}{ { (\sec\theta) }^{2} } ) \\ \implies \: { (\sin\theta) }^{2} + { (\cos\theta) }^{2} = 1$