Question

if theta is an acute angle and sin theta =0.4, find the value of sec theta+tan theta​

Answer 1

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$= \frac{5 + 2}{ \sqrt{21} } \\ \\ = \frac{7}{ \sqrt{21} } \times \frac{ \sqrt{21} }{ \sqrt{21} } \\ \\ = \cancel \frac{7 \sqrt{21} }{21} \\ \\ = \frac{ \sqrt{21} }{3}$

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