Question cos2(x)cos2(y)−2cos(x)cos(y)cos(xy) Simplify the expression cos2(y)cos2(x)−2cos(xy)cos(y)cos(x) Evaluate cos2(x)cos2(y)−2cos(x)cos(y)cos(xy)Multiply the terms (cos(x)cos(y))2−2cos(x)cos(y)cos(xy)Rewrite the expression (cos(y)cos(x))2−2cos(xy)cos(y)cos(x)Solution cos2(y)cos2(x)−2cos(xy)cos(y)cos(x) Show Solution Factor the expression cos(x)cos(y)(cos(y)cos(x)−2cos(xy)) Evaluate cos2(x)cos2(y)−2cos(x)cos(y)cos(xy)Multiply the terms (cos(x)cos(y))2−2cos(x)cos(y)cos(xy)Rewrite the expression cos(x)cos(y)cos(y)cos(x)−cos(x)cos(y)×2cos(xy)Solution cos(x)cos(y)(cos(y)cos(x)−2cos(xy)) Show Solution