Left Side:#=(1+sec theta)/(tan theta +sin theta)#
#=(1+1/cos theta)/(sin theta /cos theta + sin theta)#
#=((cos theta+1)/cos theta)/((sin theta + sin theta cos theta)/cos theta)#
#=(cos theta+1)/cos theta xx cos theta/(sin theta + sin theta cos theta)#
#=(cos theta+1)/(sin theta + sin theta cos theta)#
#=(cos theta+1)/(sin theta(1+cos theta))#
#=(cos theta+1)/(sin theta(cos theta+1))#
#=1/sin theta#
#=csc theta#
#=#Right Side