Answer:
21
Step-by-step explanation:
Volume= (4/3)*pi*r^3
40007= (4/3)*pi*r^3
r=21m
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
A. the first one is the answer
Step-by-step explanation:
