To simplify the expression ctg²x - cos²x - ctg²x*cos²x, we can use the trigonometric identities:
Therefore:
ctg²x - cos²x - ctg²xcos²= (1/tan(x))² - cos²(x) - (1/tan(x))(cos²(x)= (1/tan²(x)) - cos²(x) - (cos²(x)/tan(x)= (1/sin²(x)) - cos²(x) - (cos²(x)*(1-sin²(x))/sin(x)= (1/sin²(x)) - cos²(x) - (cos²(x)/sin(x) - cos²(x)sin(x)= (1/sin²(x)) - cos²(x) - (cos(x)sin(x) - cos²(x)sin(x)= (1/sin²(x)) - cos²(x) - cos(x)sin(x)(1 - cos(x)= (1/sin²(x)) - cos²(x) - cos(x)sin(x)sin(x= (1/sin²(x)) - cos²(x) - cos(x)sin²(x= (1/sin²(x)) - cos²(x) - cos(x)(1 - cos²(x)= (1/sin²(x)) - cos²(x) - cos(x) - cos(x)cos²(x= (1/sin²(x)) - cos²(x) - cos(x) - cos(x) + cos(x)sin²(x= (1/sin²(x)) - cos²(x) - 2cos(x) + cos(x= (1/sin²(x)) - cos²(x) - cos(x= csc²(x) - cos²(x) - cos(x)
Therefore, ctg²x - cos²x - ctg²xcos²x simplifies to csc²(x) - cos²(x) - cos(x).
To simplify the expression ctg²x - cos²x - ctg²x*cos²x, we can use the trigonometric identities:
ctg(x) = 1/tan(x)cos²(x) = 1 - sin²(x)Therefore:
ctg²x - cos²x - ctg²xcos²
= (1/tan(x))² - cos²(x) - (1/tan(x))(cos²(x)
= (1/tan²(x)) - cos²(x) - (cos²(x)/tan(x)
= (1/sin²(x)) - cos²(x) - (cos²(x)*(1-sin²(x))/sin(x)
= (1/sin²(x)) - cos²(x) - (cos²(x)/sin(x) - cos²(x)sin(x)
= (1/sin²(x)) - cos²(x) - (cos(x)sin(x) - cos²(x)sin(x)
= (1/sin²(x)) - cos²(x) - cos(x)sin(x)(1 - cos(x)
= (1/sin²(x)) - cos²(x) - cos(x)sin(x)sin(x
= (1/sin²(x)) - cos²(x) - cos(x)sin²(x
= (1/sin²(x)) - cos²(x) - cos(x)(1 - cos²(x)
= (1/sin²(x)) - cos²(x) - cos(x) - cos(x)cos²(x
= (1/sin²(x)) - cos²(x) - cos(x) - cos(x) + cos(x)sin²(x
= (1/sin²(x)) - cos²(x) - 2cos(x) + cos(x
= (1/sin²(x)) - cos²(x) - cos(x
= csc²(x) - cos²(x) - cos(x)
Therefore, ctg²x - cos²x - ctg²xcos²x simplifies to csc²(x) - cos²(x) - cos(x).