Question

9) plz solve this questions

10)

11)

Answer 1

Answer:

Step-by-step explanation:

Answer 2

$(tan \: + \frac{1}{tan} {)}^{2} = tan {}^{2} + \frac{1}{{tan}^{2} } + 2 \: \\ \\ {2}^{2} - 2 = {tan}^{2} + \frac{1}{ {tan}^{2} } \\ \\ {tan}^{2} + \frac{1}{ {tan}^{2} } = 2$



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