Back to Use special triangles and unit circle — Problem 4 · Task Set 67

HSF.TF.A.3 Tutor Intake — Special Triangles and Exact Trig Values

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Grade 9·11 problems·~13 min·Common Core Math - HS Functions·group·hsf-tf-a-3

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Procedures

What is the exact value of $\cos\!\left(\frac{7\pi}{6}\right)$ ?

(Hint: $\frac{7\pi}{6} = \pi + \frac{\pi}{6}$ )

$\dfrac{\sqrt{3}}{2}$

$\dfrac{1}{2}$

$-\dfrac{\sqrt{3}}{2}$

$-\dfrac{1}{2}$