Prove using identities
((sinx))/(1+sinx)-((sinx))/(1-sinx) =-2tan^(2)x

answer: 414,377,008

step-by-step explanation:

just multiply it

4

step-by-step explanation:

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!