Find an angle between 0 and 2pi that is coterminal with -4pi/3

Select the correct answer from each drop-down menu. consider the following polynomials equations. 3x^2(x-1) and -3x^3+ 4x^2-2x+1 perform each operation and determine if the result is a polynomial. is the result of a + b a polynomial? yes or no is the result of a - b a polynomial? yes or no is the result of a · b a polynomial? yes or no

How to do a maths question? i have a mock

Angle a and angle b are both supplementary angles. what must be true about the angles?