Find the indicated side length by using sin, cos, and tan.

Given f(x) = 2x^2- 5x+1, determine the function value f(2). do not f(x) = in your answer

Find the value of p for which the polynomial 3x^3 -x^2 + px +1 is exactly divisible by x-1, hence factorise the polynomial

David is spreading mulch on a triangular area of his flower bed. the coordinates of the vertices of the area are (1, 3), (9, 3), and (4, 6). what is the area of the triangle if each square has an area of 3 square feet?