The angle of a sector of a circle is 75 If the radius of this circle is increasing at the rate of 0.3cm/s find the rate of increase of the area when the radius is 6cm

Answer 1

a = 75/360 * π * r^2

da/dt = 75/360 * π * 2r dr/dt

da/dt = 75/360 * π * 2 * 6 * 0.3

Answer 2

Teach me I don't know it

Answer 3

Full answer please and teach me

Answer 4

I want full solution