Question

1-sin^2A/cos^2A=tanA,then the value of A is_______
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Answer 1

Answer:

$\frac{1 - { \sin }^{2} a}{ { \cos }^{2} a} = \tan(a) \\ \frac{ { \cos}^{2} a}{ { \cos }^{2} a} = \tan(a) \\ \tan(a) = 1 \\ \tan(a) = \tan(45) \\ a = 45$