�PNG


IHDRk./*��	pHYs��
�+baSEC�YkIDATx��1H#A�I%�B�FDD���C9��9�8{���CD�F��H�Tr�WX�9$�Ⱀp����c�]u6C�~t��Y�7o�%�J�O]op��*�ܟd���`�S�
:�z,��1���1>��j�u�r��ld�kK�
��:[=Yߠ"4 �IJ�a�}���B�#����\�&���7b��+���f�
�R�y
RYf�&H��<�Fl��d)��p���:̣�ۍX���&++U���2?����6%y�j�m�ѓUqXY��p-��)�*z�~F8���O7#�Jk��(,C]�_�)^�z�]���B�y9g�zH�njy�c4
%��&�/YA�~��E��te���,�	�.FWX���	ћ�����
�����e ���2�9E!�B�;S����{�V���}i��B[к��跲�3�{������}?_4b��u�JO�,�,o.m_
?���6��������f�(;�3Ar��36�,o�m_
�2�b��w��J
��χ_�9��J�w�7׶/ͪz�+�6SJ�w�7׶���Wa6,-��dyiyse���/���--�hy#
7-o�@˛G��F!�B!)��Edx���
�tEXtMathML<math xmlns="http://www.w3.org/1998/Math/MathML"><mfrac><mrow><mi>hcot</mi><mi mathvariant="normal">&#xA0;</mi><mi mathvariant="normal">y</mi></mrow><mrow><mi>cot</mi><mi mathvariant="normal">&#xA0;</mi><mi mathvariant="normal">x</mi><mi mathvariant="normal">&#xA0;</mi><mo>+</mo><mi mathvariant="normal">&#xA0;</mi><mi>cot</mi><mi mathvariant="normal">&#xA0;</mi><mi mathvariant="normal">y</mi></mrow></mfrac></math>~�l�IEND�B`�