Question

1 by sin10 -
$\sqrt{3}$
by cos10=4





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Answer 1

Answer:

4

Step-by-step explanation:

Here's the explanation

$\frac{1}{ \sin(10) } - \frac{ \sqrt{3} }{ \cos(10) } \\ = \frac{ \cos(10) - \ \sin(10) \sqrt{3} }{ \sin(10) \cos(10) } \\ = 2 \times \frac{ \frac{1}{2} \cos(10) - \frac{ \sqrt{3} }{2} \sin(10) }{ \sin(10) \cos(10) } \\ = 2 \times \frac{ \sin(30 - 10) }{ \sin(10) \cos(10) } \\ = 2 \times 2 \times \frac{ \sin(20) }{2 \sin(10) \cos(10) } \\ = 4 \times \frac{ \sin(20) }{ \sin(20) } \\ = 4$

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