Oklahoma Academic Standards for Mathematics 2022

PC.T.1.4

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Use special triangles to determine geometrically the values of sine, cosine, tangent for $\frac{\pi}{3}, \frac{\pi}{4},$ and $\frac{\pi}{6},$ and use the unit circle to express the values of sine, cosine, and tangent for 𝜋 − 𝑥, 𝜋 + 𝑥, and 2𝜋 − 𝑥 in terms of their values for *x*, where *x* is any real number.

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