Cot^2x - cot^2x cos^2x
= cot^2x - {(cot^2x)(cos^2x)}
= cot^2x { 1 - cos^2x }
= cot^2x { sin^2x }
= (cos^2x/sin^2x) { sin^2x }
= cos^2x
Answer:
-23
Step-by-step explanation:
1km is 1000 m
1000m+125m-375m=750m
So,
We can just subtract the fractions without converting any denominators. To do that, we can split the subtraction problem up as follows:
12 - 5 - 1/8
7 - 1/8
6 7/8
Sally still has 6 7/8 or 6.875 miles to run.
