Ответы на вопрос:
Cosx = 5/13 sinx = √1 - cos^2x = 1 - 25/169 = √144/169 = 12/13 tgx = sinx/cosx = 12/13 * 13/5 = 12/5 ctgx = cosx/sinx = 5/13 * 13/12 = 5/12
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