(sin220°*cos8°+cos158°*cos98°)/(sin23°*cos7°+cos157°*cos97°)

Если не 220 а 202, то решается хорошо. [latex] \frac{cos202cos8+cos158cos98}{sin23cos7+cos157cos97} [/latex]= =[latex]\frac{cos(180+22)cos8+cos(180-22)cos(90+8)}{sin23cos7+cos(180-23)cos(90+7)} [/latex]= [latex]= \frac{-sin22cos8+cos22sin8}{sin23cos7+cos23sin7}= [/latex] [latex]= \frac{-sin14}{sin30}=-2sin14 [/latex]