Given: 3y cos x = x² + y²
Define

Then by implicit differentiation, obtain
3y' cos(x) - 3y sin(x) = 2x + 2y y'
y' [3 cos(x) - 2y] = 2x + 3y sinx)
Answer:
Something to the second power is simply that number multiplied by itself once. The third power is something multiplied by itself 2 times, and so on
The measure of angle KNM is 155 since the measure of an arc is the measure of its central angle. Just add 83 degrees to 72 degrees.
Rational numbers is the answer. Rational numbers can be expressed as the ratio of two integers.