US Common Core State Standard Math HSF-TF.A.3

Demonstrations 1 - 18 of 18

Description of Standard: (+) Use special triangles to determine geometrically the values of sine, cosine, tangent for π/3, π/4 and π/6, and use the unit circle to express the values of sine, cosines, and tangent for *x*, π + *x*, and 2π – *x* in terms of their values for *x*, where *x* is any real number.