Question

answer of the question 31

Answer 1

Hey!!!

This is so simple......
Here pi means 180 degrees

Cos pi/12 = 180/12 =cos 15
Sin pi/12 = sin 15
Tan pi/12 = tan 15
Cot pi/12 = cot 15
=>(cos 15 - sin 15) (tan 15 +cot 15) =
$\sqrt{3} - 1 \div 2 \sqrt{3}$
:-) hope it helps......

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