We have:

Then we use trigonometric identities to change the negative sign of the trigonometric functions, so:

We clear f(x):

we simply what we can:

Thus, the correct answer is;
Sent a picture of the solution to the problem (s).
Answer:
V=πr2h
3=π·72·9
3≈461.81412
Step-by-step explanation:
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Answer:
umm search on google,use caculater soup
Step-by-step explanation: