Find the exact value of trigonometric ratios  Trigonometric Ratios and Angle Measures
Find the exact value of trigonometric ratios
Basic Concepts
 Solving expressions using 454590 special right triangles
 Solving expressions using 306090 special right triangles
 Reference angle
 ASTC rule in trigonometry (All Students Take Calculus)
Related Concepts
 Sine graph: y = sin x
 Cosine graph: y = cos x
 Tangent graph: y = tan x
Lessons
Notes:

1.
Find the exact value of all six trigonometric ratios, then make a conclusion
which primary trigonometric ratios (sin $\theta , cos \theta, tan \theta$) are positive in each
quadrant