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Be able to apply these to all the quadrants.

      cos cot sin u u u  Reciprocal     1 sec cos u u      1 csc sin u u  Pythagorean             2 2 2 2 2 2 cos sin 1 1 tan sec 1 cot csc u u u u u u       Know the exact values of sine, cosine, and tangent for 0,, ,, 6 4 3 2    . Download Trigonometric Identities Cheat Sheet and more Trigonometry Cheat Sheet in PDF only on Docsity!Trigonometry Identities  Must have these memorized for Test and Final Exam Ratio       sin tan cos u u u .