can you provide me all trigonometric identities
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There are six functions of an angle commonly used in trigonometry. ... Problems involving angles and distances in one plane are covered in plane trigonometry. ... He considered every triangle—planar or spherical—as being inscribed in a ...
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•Sin2A + cos2A =1
•1 + tan2A = sec2A
•1 + cot2A = cosec2A
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