Using the identity sin 2q +cos2q =1, find the value of cosq, to the nearest thousandth, if sinq = -0.5and is in Quadrant III.

i honestly dont know

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!