How would you go about evaluate the integral below :?

Question

ò ò cos q dA
R

where R is the third quadrant area inside the circle given by r = 4 and outside the circle given by r = 2 .


a. -12
b. -6
c. -3
d. -1
e. 0
f. 1
g. 2
h. 3
i. 6
j. 12

or is it none of these?

Answer 1

Still don't understand your notation. What does ò ò mean?