тригонометрия. Вычислить. Решите плиз!!!
cos68°cos8° - cos82° cos22°
________________________ =
cos53°cos23°- cos67° cos37°
cos68*cos8-cos82*cos22/cos53*cos23-cos67*cos37=cos68*sin82-cos82*sin68/cos53*sin67-cos67*sin53=sin(82-68)/sin(67-53)=sin14/sin14=1