Question

$|sin10 \div sin80 \: - cos10 \div \cos80$
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Answer 1

sin10 /sin80 -- cos10/cos80

=sin10 /sin(90-10) -- cos10/cos(90-10)

=sin10/cos10 -- cos10/sin10

=tan10 -- cot10

Answer 2

Tan(10) - Cos(10) is the answer