Answer:
No extra pieces.
Step-by-step explanation:
Given:
Total number of foot board = 3
Equally divided into = 1/2
Question asked:
How many extra pieces will I have = ?
Solution:
By dividing 3 by 1/2 we can find the extra pieces.
= 
= 
= 
Since, the remainder is zero, thus there is no any extra pieces I have.
I think it is the third choice
Answer:
1/16
Step-by-step explanation:
Both 5 and 80 can be divided by 5.
This reduces the ratio of 5/80 to 1/16.
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