- Find the exact value of cos(2pi/3+pi/6)? Step by step?

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The common ratio for the following geometric sequence 1/3 3/15 9/75 27/375? A polynomial has remainder 3 when divided by (x-2) and a remainder of -5 when divided by (x+2) what is the remainder when divided by (x^2-4)? Find the points on the curve y=((x^3)/3)-x where the tan line is parallel to the line y=3x? A cylinder's volume is given by (πx^3+4πx^2-3πx-18π cm^3). If the radius of the cylinder is (x+3) cm, what is the height in terms of x? ? How much longer would it take to mow an acre with a mower that has a 4 ft wide deck vs. one w/ a 6 ft wide deck (if moving at same speed)?