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sinx · cosx = -12/49
tgx + ctgx = sinx/cosx + cosx/sinx = (sin²x + cos²x)/(sinx · cosx) =
1/(sinx · cosx) = -49/12
Ответ: -49/12
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!!!!!!!!!!!!!!!!!!!!!!!
sinx · cosx = -12/49
tgx + ctgx = sinx/cosx + cosx/sinx = (sin²x + cos²x)/(sinx · cosx) =
1/(sinx · cosx) = -49/12
Ответ: -49/12