explain please

Suppose that cos 6 = 2/5 and that 6 is a Quadrant ll angle. (a) Find the exact value of sin 6. Show work. (b) Find the exact value of sin(20). Show work. \f26. For the triangle ABC, we are given that A = 48, B = 620, and c = 35.0. b 480 A 620 C = 35 B Find the length of side a, rounded to the nearest tenth. Show work.2.7. Let Ti = (12, 10) and 75 = (5, 6). (b) Calculate the dot product Ti - T5. Show work. (c) Determine the angle between i and 3. Round the result to the nearest degree. Show work. 28. An ellipse has the equation (x - 1)2 (y - 6)2 144 + 100 = 1 (a) Is the major axis horizontal or vertical? (b) Find the exact values of the foci of the ellipse. Show work