The document provides information on trigonometric ratios including: 1) It defines the six main trigonometric ratios (sine, cosine, tangent, cotangent, secant, cosecant) using coordinates on a unit circle. 2) It explains the signs of the ratios in the four quadrants of the coordinate plane. 3) It discusses the range of values that the six ratios can take. 4) It provides a table of the exact ratio values for 0, π/6, π/4, π/3, π/2, π, 3π/2, and 2π. 5) It covers fundamental trigonometric