Question

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Answer 1

Answer:

$if \: tan4 \alpha + tan6 \alpha = 1 \\ and \: tan \alpha = cot(90 - \alpha ) \\ so \: cot4(90 - \alpha ) + tan6 \alpha = 1 \\ take \: common \\ cot360 - cot4 \alpha + tan6 \alpha = 1 \\ \\ \\ and \: \alpha = 90 \\ so \: sec90 = \sqrt{5}$

Answer 2

$\huge\red{Answer}$

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