Back to Use special triangles and unit circle — Problem 2 · Task Set 67

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

This short check helps your tutor understand where to start. Answer each question on your own. If you are not sure, give your best try — every response helps your tutor plan your sessions.

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

Work through problems with immediate feedback

Concepts

Which pair of values correctly gives $\sin\!\left(\frac{\pi}{4}\right)$
and $\cos\!\left(\frac{\pi}{4}\right)$ ?

$\sin\!\left(\frac{\pi}{4}\right) = \frac{1}{2}$ , $\cos\!\left(\frac{\pi}{4}\right) = \frac{\sqrt{3}}{2}$

$\sin\!\left(\frac{\pi}{4}\right) = \frac{\sqrt{3}}{2}$ , $\cos\!\left(\frac{\pi}{4}\right) = \frac{1}{2}$

$\sin\!\left(\frac{\pi}{4}\right) = \frac{\sqrt{2}}{2}$ , $\cos\!\left(\frac{\pi}{4}\right) = \frac{\sqrt{2}}{2}$

$\sin\!\left(\frac{\pi}{4}\right) = 1$ , $\cos\!\left(\frac{\pi}{4}\right) = 1$