Pythagorean Identity and Basic Trig Identities

Grade 10·25 problems·~37 min·ACT Math·topic·act-geo-trig-pythagid

Work through problems with immediate feedback

Recall / Warm-Up

$Unit circle with x and y axes and the four quadrants labeled with Roman numerals I through IV.$

In which quadrants is cosine negative?

Quadrants I and II

Quadrants II and III

Quadrants III and IV

Quadrants I and IV