Question

1 + cot 60°
(1-сot 60°)
1+ cos 30°
1- cos 30°​

Answer 1

1+cot60°

=

$1 + \frac{1}{ \sqrt{3} } = \frac{ \sqrt{3 } + 1}{ \sqrt{3} }$

1-cot60°

=

$\frac{ \sqrt{3} - 1 } { \sqrt{3} }$

1+cos30°

=

$\frac{2 + \sqrt{3} }{2}$

1-cos30°

$= \frac{2 - \sqrt{3} }{2}$