Which expression equals 1? a. sin(x) + cos(x) b. sin^2(x) + cos^2(x) c. sin^2(x) - cos^2(x) d. sin(x) - cos(x)

the answer is:

the correct option is the option b.

to calculate the surface area of the right cylinder, we need to use the following formula:

from the picture we know that:

so, substituting and calculting we have:

hence, we have that the correct option is the option b.

have a nice day!

answer is  

minor arc – sw

major arc – stu

semicircle – wst

i got it down chief.