{"id":6573,"date":"2026-07-13T13:29:15","date_gmt":"2026-07-13T18:29:15","guid":{"rendered":"https:\/\/www.eastcentral.edu\/learning-center\/?page_id=6573"},"modified":"2026-07-13T13:29:33","modified_gmt":"2026-07-13T18:29:33","slug":"trig-values-on-the-unit-circle","status":"publish","type":"page","link":"https:\/\/www.eastcentral.edu\/learning-center\/trig-values-on-the-unit-circle\/","title":{"rendered":"Trig Values on the Unit Circle"},"content":{"rendered":"

*Trig values for the other quadrants can be easily derived from their first-quadrant values.<\/p>\n

*To use these values, you must determine the reference angles for each angle measurement in the other quadrants. A reference angle is an angle created by the terminal side of an angle and the x-axis as the other side. From the reference angle, you can determine the equivalent angle in the first quadrant and then assign the +\/- sign associated with the function in that quadrant.<\/p>\n

*Here are the signs associated with the different functions in each of the four quadrants.<\/p>\n

Quadrant 1: Sine, cosine, and tangent are all positive
Quadrant 2: Sine is positive; cosine and tangent are negative.
Quadrant 3: Sine and cosine are negative; tangent is positive.
Quadrant 4: Sine and tangent are negative; cosine is positive.<\/p>\n\n

\n
\"Â鶹Éç<\/a>
For more help, contact The Learning Center<\/figcaption><\/figure>\n<\/div>","protected":false},"excerpt":{"rendered":"

*Trig values for the other quadrants can be easily derived from their first-quadrant values. *To use these values, you must determine the reference angles for each angle measurement in the other quadrants. A reference angle is an angle created by the terminal side of an angle and the x-axis as the other side. From the […]<\/p>\n","protected":false},"author":12,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_eb_attr":"","footnotes":""},"class_list":["post-6573","page","type-page","status-publish","hentry"],"yoast_head":"\nTrig Values on the Unit Circle - Learning Center<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.eastcentral.edu\/learning-center\/trig-values-on-the-unit-circle\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Trig Values on the Unit Circle - Learning Center\" \/>\n<meta property=\"og:description\" content=\"*Trig values for the other quadrants can be easily derived from their first-quadrant values. *To use these values, you must determine the reference angles for each angle measurement in the other quadrants. 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