COHEN. (1998). Precalculus: With unit-circle trigonometry (3rd ed.). Pacific Grove: Brooks/Cole Pub.
Chicago Style CitationCOHEN. Precalculus: With Unit-circle Trigonometry. 3rd ed. Pacific Grove: Brooks/Cole Pub, 1998.
MLA CitationCOHEN. Precalculus: With Unit-circle Trigonometry. 3rd ed. Pacific Grove: Brooks/Cole Pub, 1998.
Warning: These citations may not always be 100% accurate.