Back to Use special triangles and unit circle — Problem 3 · 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
Work through problems with immediate feedback
A
Concepts
1.
A point at angle in the first quadrant of the unit circle has
coordinates .
Write the coordinates of the point at angle and explain,
in one or two sentences, why the y-coordinate stays the same while
the x-coordinate changes sign.