Answer:
Coefficient of Performance
Answer
None of the above
Step-by-step explanation:
As it stands, it's none of those. I believe you were going for the distance formula but copied it wrong.
Answer:
3/8
Step-by-step explanation:
Rearrange, find common denominator.

Answer:
Using trigonometric ratio:


From the given statement:
and sin < 0
⇒
lies in the 3rd quadrant.
then;

Using trigonometry identities:
Substitute the given values we have;

Since, sin < 0
⇒
now, find
:

Substitute the given values we have;

Therefore, the exact value of:
(a)

(b)
