Question

9 sec² 30°-9 tan² 30° Its value​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

$9$

Step-by-step explanation:

$Given, \: \: \: \: 9sec²30°-tan²30° \\ = 9(sec²30°-tan²30°) \\ = 9 \times 1 = 9 \\ use \: \boxed{sec² \theta-tan² \theta = 1}$